K Service Source iMac
K Service Source Hot Issues iMac
Hot Issues Introduction - 1 Introduction This chapter is designed to highlight unique or highpriority product issues that you should be aware of before servicing the iMac computer. This chapter alerts you to important issues and provides pointers to other areas in the manual where more complete information can be found. This chapter is not intended to replace other parts of this manual; it merely provides a pointer to pertinent information in those chapters.
Hot Issues Mixed Memory Types - 2 Mixed Memory Types The iMac computer uses SDRAM SO-DIMMs only; EDO memory will not work in the iMac computer. System problems will result if EDO memory is installed. (See “SDRAM DIMMs” in the Basics chapter and refer to the iMac section of the Memory Guide.) Note: Customers are allowed to upgrade the memory in iMac computers and may inadvertently mix EDO and SDRAM memory. If incompatible memory types are installed, you will hear two beeps upon startup.
Hot Issues Mixed Memory Types - 3 SGRAM Video Memory The iMac computers use SGRAM video memory. Use only SGRAM SO-DIMMs in these machines. Never install the 256K or 512K video memory DIMMs used in older Macintosh computers. (See “SGRAM Video Memory” in the Basics chapter.) Error Beeps If problems are detected upon startup, the iMac system will sound one or more error beeps. (See “Error Beeps” in the Troubleshooting chapter.
Hot Issues HFS Plus Formatted Drives - 4 HFS Plus Formatted Drives The iMac hard drive is formatted from the factory with Mac OS Extended format, also referred to as HFS Plus. Norton Utilities version 3.5 is not compatible with HFS Plus and version 3.5.1 and earlier can result in hard drive corruption and loss of all data on the hard drive. (See “HFS Plus Formatted Drives” in the Troubleshooting chapter.
Hot Issues Forcing a Restart - 5 Forcing a Restart If holding down the Command, Control, and Power keys fails to restart the iMac computer after a system hang, you can force a restart in one of two ways: First, try inserting a straightened paper clip in the reset button hole. (Open the I/O door on the side of the iMac. The reset button hole is the top hole located between the Ethernet and modem ports and marked with a triangle symbol.) If the reset button method doesn’t work, try the following: 1.
Hot Issues External Displays Not Supported - 6 External Displays Not Supported Connecting an external display to the iMac is not supported by Apple. The db-15 port on the iMac was not designed to support an external monitor. Apple designed iMac with a very sharp, 15-inch internal display and no video-out port to connect a second display. Refer to Tech Info Library (TIL) article #43016, “iMac: Can I Attach an External Display?” for more information.
Hot Issues iMac Updates - 7 iMac Updates Apple has released a number of updates for the iMac. Refer to TIL article #58174, iMac: When to Install Available Updaters. This TIL article will clarify when to use the available updates depending upon which version of iMac you have. Additional iMac Update articles: • TIL article # 26115, CD Firmware Update 1.0 The CD Firmware Update reduces the amount of vibration caused by certain CDs in the internal CD-ROM drive. • TIL article #44005, iMac Update 1.
Hot Issues iMac Updates - 8 and those previously released in iMac Update 1.0. This update improves the ability of iMac to identify USB devices when starting up, improves the startup time when many USB devices are connected, and enables new USB solutions. You do not have to install iMac Update 1.0 before you install iMac Update 1.1.
Hot Issues CD-ROM Door Not Latching Closed - 9 CD-ROM Door Not Latching Closed After manually ejecting CDs from the iMac CD-ROM tray (of both /A and /B models), the eject mechanism sometimes does not reset into a position that allows the tray door to close properly. Instead of replacing the CD-ROM assembly, the eject mechanism can be manually reset with a paperclip to correct the problem. Refer to “Resetting CD-ROM Eject Mechanism” in Additional Procedures.
Hot Issues Revision vs. Version Part Numbers - 1 0 Revision vs. Version Part Numbers Moving forward, the Service Parts database will identify service parts (upgrades, changes, or variations) with the word Rev. (Revision) or Ver. (Version) appended to the part name. For example: 661-2193 Card, Processor, 333 MHz, Rev. 3 661-2113 Board, Logic, iMac, Ver. 2 • Revision (Rev.)= A change or upgrade to the part. The new Rev. is backward compatible and will eventually replace the earlier part number.
Hot Issues Version 2 Service Parts - 1 1 Version 2 Service Parts Listed below are the Ver. 2 iMac service parts. Exchange or replace the Ver. 2 parts like-for-like, they are not backward compatible. Identify the part correctly before replacing a module or replacement part. Refer to the Service Parts database for additional information. • • • • • • • • • • 661-2166 Analog/Video Board, Ver. 2 661-2167 Power Supply Board, Ver. 2 922-3835 Grounding Wire, CRT, Ver. 2 922-3836 Audio Cable, Ver.
Hot Issues New CD-ROM Drive Released (7/99) - 1 2 New CD-ROM Drive Released (7/99) Apple recently released a new 24x CD-ROM drive service part for five-color iMacs with 266MHz processors or faster only. Please note that this new 24x CD-ROM, called the Version 2, is not compatible with the 24x CD-ROM drive in the 233MHz Bondi Blue iMacs. Although the two iMac CD-ROM drives are identical in fit and performance, the drives are not interchangeable.
Hot Issues New CD-ROM Drive Released (7/99) - 1 3 Ordering Parts • If you are replacing a 24x CD-ROM drive in a Bondi Blue iMac (233MHz), order the 661-2076 CD-ROM drive. • If you are replacing a 24x CD-ROM drive in a five-color iMac (266MHz or greater), order 661-2207, CD-ROM drive, 24X, Ver. 2. Refer to the Service Parts database for additional information.
K Service Source Basics iMac
Basics - 1 Overview
Basics Product Description - 2 Product Description The iMac is an all-in-one product with a unique industrial design that is targeted specifically for the consumer and education market.
Basics Standard Configurations - 3 Standard Configurations • PowerPC G3 microprocessor running at 233, 266 or 333 MHz • System bus speed at 66 MHz • Backside cache of 512K • 32 MB SDRAM SO-DIMM standard, expandable to 256 MB total using 144-pin, 100 MHz or faster SO-DIMM modules • 6 MB SGRAM standard • Built-in 15” CRT (13.
Basics Standard Configurations - 4 • One 10/100 BaseT Ethernet RJ-45 connector for connection to 10 mb/s or 100 mb/s networks • Two internal ATA connectors: one supports the hard disk drive and one supports the CD-ROM drive • Two 3.5 millimeter (mm) headphone jacks • One 3.5 mm sound output port for stereo sound output • One 3.5 mm sound input port for stereo sound input. The sound input port supports the Apple PlainTalk Microphone that comes with some Macintosh computers.
Basics Model Comparison - 5 Model Comparison 233 MHz and 266 MHz iMac Models The following information describes the main features of the 233 MHz and 266 MHz iMac models. Note: Apple regularly makes modest design improvements to products during their life cycles. These changes may include minor changes to the logic board or additions in the bundled software. Bondi Blue (w/IrDA) M6709LL/A • OS Software: Mac OS 8.
Basics Model Comparison - 6 Bondi Blue (no IrDA) M6709LL/B • OS Software: Mac OS 8.5 • ProcessorSpeed: 233 MHz • Reset Procedure: Front Power Button • Standard SGRAM: 2 MB SGRAM Built-in + 4 MB SGRAM DIMM • Hard Drive: 4 GB • Graphic Chip: ATI Rage Pro Blueberry, (no IrDA) M7345LL/A • OS Software: Mac OS 8.5.
Basics Model Comparison - 7 Strawberry, (no IrDA) M7389LL/A • OS Software: Mac OS 8.5.1 • ProcessorSpeed: 266 MHz • Reset Procedure: Front Power Button • Standard SGRAM: 2 MB SGRAM Built-in + 4 MB SGRAM DIMM • Hard Drive: 6 GB • Graphic Chip: ATI Rage Pro Turbo Grape, (no IrDA) M7390LL/A • OS Software: Mac OS 8.5.
Basics Model Comparison - 8 Tangerine, (no IrDA) M7391LL/A • OS Software: Mac OS 8.5.1 • ProcessorSpeed: 266 MHz • Reset Procedure: Front Power Button • Standard SGRAM: 2 MB SGRAM Built-in + 4 MB SGRAM DIMM • Hard Drive: 6 GB • Graphic Chip: ATI Rage Pro Turbo Lime, (no IrDA) M7392LL/A • OS Software: Mac OS 8.5.
Basics Model Comparison - 9 333 MHz iMac Models On April 14, 1999 Apple announced the 333 MHz iMac. There were no other configuration changes to these computers other than the processor speed.
Basics New Technologies - 1 0 New Technologies Infrared Communication The iMac (models M6709LL/A and M6709LL/B) come with built-in 1-megabit infrared technology for easy, wireless LAN access and file sharing with similarly equipped systems. The iMac logic board has one IrDA (Infrared Data Association) compliant connector that offers a maximum transfer speed of 4 MB/sec (AppleTalk and TCP/IP). The iMac also allows users to switch to the IRTalk protocol by using the Infrared Control Panel.
Basics New Technologies - 1 1 For information about whether iMac computers can communicate with other third-party IrDA compliant devices, contact the manufacturer of the third-party device. The iMac supports the following Apple devices on the IrDA channel: • PowerBook 2400 and 3400 • Macintosh Powerbook G3 IrDA vs. IRTalk There are two main differences between IRTalk and IrDA: 1. IrDA is an industry standard, while IRTalk is an Appleonly technology. 2.
Basics New Technologies - 1 2 Infrared connections that are established as well as what type of infrared the iMac is currently set to use. For infrared options to work there are three drivers that must be in the Control Panels or Extensions folder. They are: • Infrared Control Panel • IrDALib Extension • IrLanScannerPPC Extension If these icons are not present or disabled, you will not be able to make infrared connections from the iMac.
Basics New Technologies - 1 3 USB Support Universal Serial Bus (USB) is a new device communication standard developed by the computer and telecommunication industries. USB provides a powerful, hot-swappable, “true plug-and-play” interface between a host computer and addon peripheral devices. (Note: “Hot-swappable” means that you can plug in, use, and unplug devices without having to shut down the host computer.
Basics New Technologies - 1 4 connect peripheral devices to a host computer on the fly, without having to hassle with • Shutting down/restarting the computer • Opening the computer case • Installing a card • ID conflicts • Termination issues • Loading device drivers (although some devices may require a one-time driver installation).
Basics New Technologies - 1 5 second (Mbps) • Automatic adjustment of bandwidth allocation among devices.
Basics New Technologies - 1 6 USB devices use two types of plugs, Type A and Type B: Figure 1: USB Plug Types
Basics New Technologies - 1 7 The Type A plug (pictured on the left) connects to the host computer or an upstream hub. The Type B plug (pictured on the right) connects downstream to the USB device. Some devices, such as mouse devices, have a Type B plug built into the device. Note: “Upstream” means moving up the device chain, in the direction of the host computer. “Downstream” means moving down the device chain, away from the host computer. Figure 2 on the next page illustrates this concept.
Basics New Technologies - 1 8 Figure 2: Defining Upstream/Downstream Terms
Basics New Technologies - 1 9 Benefits of USB Technology The advantages of USB technology include hot-swapping capability, auto-configuring, and ease of use.
Basics New Technologies - 2 0 How a USB Device is Installed and Used A USB network is made up of the following components: • An operating system that supports USB. (Both iMac and Windows 98 support USB.) • A host, typically a controller chip set residing in the personal computer, controls the USB system and allocates bandwidth per device. There is only one host per USB network, and as such USB is designed for connecting peripherals to the computer, not computers (or hosts) to each other.
Basics New Technologies - 2 1 Type A Ports FIgure 3: USB Ports
Basics New Technologies - 2 2 Note: Type A ports (as shown in the previous illustration) are only available from hubs. If a device (like a keyboard or display) has Type A ports for additional devices to connect to, it must have an internal hub. This information is good to know when you need to identify, map out, and troubleshoot hub and device connectivity. Note: USB ports, cables, and plugs are often labeled with the standard USB symbol shown in the following illustration.
Basics New Technologies - 2 3 • Hubs, which serve as connection points for devices. Hubs also provide device detection, speed matching, and power control. Hubs connect to the host using the 12 Mbps connection speed. Hubs may be “bus-powered” by the USB, or be “self-powered” by an external power source (like an AC adapter). Only hubs can connect to the host. Hubs can also connect to other hubs, providing expansion to the 127 device limit (see the example tree diagram below).
Basics New Technologies - 2 4 • Devices, which connect to hubs and provide expanded functionality to the computer. Devices connect to the host using either the 1.5 or the 12 Mbps connection speed. Like hubs, devices may be “bus-powered” by the USB network, or be “self-powered” by an external power source. Devices can only connect to hubs. Devices cannot connect directly to devices, but looks can be deceiving, since some devices are combined with hubs in the same physical case.
Basics New Technologies - 2 5 The following tree diagram shows an example of a USB network:
Basics New Technologies - 2 6 Host Can both Reside inside CPU Case Root Tier Hub Tier One Hub Device Device Tier Two Hub Hub Device Device Tier Three Device Device Tier Four Device Figure 5: USB Network Tiers
Basics New Technologies - 2 7 USB Connectivity Rules Following are the rules for USB connectivity: • The maximum number of devices that can be connected to a single USB hub is 127 devices. (Note: A keyboard with a built-in trackball counts as two devices.) • The maximum number of tiers allowed is six. This can be tricky to track sometimes, since hubs can be hidden in CPU cases, displays, keyboards, etc. • Bus-powered hubs can't be connected to bus-powered hubs due to power limitations.
Basics New Technologies - 2 8 Installing and Using a USB Device on a USB-Capable Mac OS Computer Carry out the following steps to install and use a USB device on a USB-capable MacOS computer: 1. Make sure your device is Mac-OS approved. Although USB devices should all conform to the USB specification, some developers' devices do not follow spec. As a result, they need specially written drivers.
Basics New Technologies - 2 9 the instructions that came with the device for details. 4. Plug the device in to an available hub port. The device should be sensed automatically, the driver should automatically load, and the device should then be ready for use. When you are finished using the device, you can leave it plugged in, or unplug it to free up the port.
Basics New Technologies - 3 0 Features
Basics Modem - 3 1 Modem The iMac computer features a built-in 56K hardware modem. This internal modem supports both K56-Flex and V.90 communications protocols. Modem Performance Issues To be able to accomplish 56K connections, your Internet Service Provider or service you are connecting to must have digital connections to the Telephone Company, and then install special 56K digital modems which can use these connections.
Basics Modem - 3 2 If you have a modem that supports this higher speed protocol, you can theoretically download data at up to 56,000 bps. With these 56K protocols, however, your upload speed is still going to occur at V.34 speeds (up to 33.6) because the digital equipment is only on your ISP's end. While the technology theoretically can achieve download speeds up to 56 kbps, current FCC rules limit the power output of modems such that you probably will not achieve that maximum speed.
Basics Modem - 3 3 always connect at 33.6 speeds or less. Also, line noise will be a major factor on how fast your 56K modem connects. For 33.6 Kbps or slower modems, line noise is still a factor, but it is much less of an issue for achieving good connections.
Basics CD-ROM Drive - 3 4 CD-ROM Drive The CD-ROM drive is located beneath the screen on the front of the iMac. To open the tray, press the button in the middle and carefully pull open the tray until it lightly clicks. To close the drive, push the tray until it is completely closed and locked into place. CD Adapter Board The CD adapter board screws onto the back of the CD-ROM drive. A ribbon cable attaches to the CD-ROM adapter board and plugs into connector J14 on the logic board.
Basics Power Filter Board - 3 5 Power Filter Board The power filter board is an EMC filtering board, which is mounted on the logic board/mass storage chassis. It controls the DC power supply connection from the enclosure and sits between the power supply board and the logic board. It is highly unlikely that the power filter board will ever fail, but information about this board is included in the “No Power” section of the Troubleshooting chapter.
Basics Audio/Video Interconnect Board - 3 6 Audio/Video Interconnect Board The audio/video interconnect board provides a bridge between the logic board and the audio on/off, video, and IrDA boards. The audio/video interconnect board sits between the logic board and the logic board/mass storage chassis.
Basics Power Supply Board Fuse - 3 7 Power Supply Board Fuse There is a fuse on the AC line on the iMac power supply board. The fuse is located at F901 (near the bottom right corner of the installed power supply board as you face the back side of the board). Instructions for how to test the fuse are included in the “Testing for Power” section of the Troubleshooting chapter.
Basics Graphics Controller - 3 8 Graphics Controller The graphics subsystem on the iMac logic board is designed with the ATI Rage IIc graphics controller ASIC. The RAGE IIc ASI contains 2D and 3D acceleration engines, a bidirectional digital video port, a front-end scaler, a back-end scaler, CRT controller, and PCI bus master capability. The graphics subsystem features an industry standard SGRAM SO-DIMM connector in addition to 2 MB of SGRAM soldered to the logic board.
Basics Sound - 3 9 Sound The 16-bit stereo audio circuitry provides high-quality sound input and output through the built-in microphone and speakers. The user can also connect external input and output devices by way of the sound input and output jacks. The sound system supports sample sizes up to 16 bits at a sample rate of 44.1 kHz.
Basics Sound Input - 4 0 Sound Input The sound system accepts inputs from three possible sources: • Built-in microphone • External stereo sound input jack • Sound from internal CD player
Basics Sound Output - 4 1 Sound Output The sound system sends computer-generated sounds to the built-in speakers, the sound output jack, and the headphone jacks. The sound system provides user-selectable SRS 3D stereo enhancement.
Basics Video Display - 4 2 Video Display The built-in video display uses a 15-inch CRT and supports three resolutions. The table below lists the resolutions and pixel depths supported with the standard 2 MB of SGRAM and with expanded SGRAM. Resolution: 640 x 480 • Vertical rate: 117.233 Hz • Pixel depth (2 MB SGRAM): 32 bits • Pixel depth (4 or 6 MB SGRAM): 32 bits Resolution: 800 x 600 • Vertical rate: 94.
Basics Video Display - 4 3 Resolution: 1024 x 768 • Vertical rate: 75.
Basics Backside Cache - 4 4 Backside Cache Backside cache is a significant architectural design change from earlier PowerPC processors. The main advantage of the backside cache architecture is the speed of the dedicated CPU-to-L2 cache interface. Using the dedicated bus allows the CPU to access the fast L2 cache storage through a highspeed bus without addressing the slower system bus or competing with other devices attached to the system bus.
Basics Backside Cache - 4 5 PowerPC G3, and a 2.5 L2 bus ratio, the backside cache bus speed will be 100MHz, twice the speed of the system bus.
Basics Memory - 4 6 Memory SDRAM DIMMs The iMac computer uses SDRAM in a SO-DIMM slot that is smaller than the RAM slots for previous desktop Power Macintosh computers. There are two SDRAM SO-DIMM slots. The bottom slot contains the pre-installed 32 MB SO-DIMM. The top slot is user installable. If a customer orders extra RAM via the build-to-order (BTO) program, that RAM will be installed in the upper slot. This means that a customer may get their iMac with both RAM slots populated.
Basics Memory - 4 7 Maximum SDRAM supported • 233 MHz/A iMac: Maximum size supported is 64 MB per slot, totaling 128 MB. This can be achieved by installing a 64 MB module in the upper slot and a 64 MB module in the lower slot. • 233 MHz/B iMac: Maximum size supported is128 MB per slot, totaling 256 MB. This can be achieved by installing a 128 MB module in the upper slot and a 128 MB module in the lower slot. • 266 MHz iMac: Maximum size supported is128 MB per slot, totaling 256 MB.
Basics Memory - 4 8 The lower RAM expansion slot will only accommodate SODIMMs that are 1.0 inch to 1.5 inches in height. A 2.0-inch DIMM will not physically fit into the slot and cannot be used. If a 128 MB DIMM existed that was smaller than 1.5 inches, it would work in the lower expansion slot. EDO SO-DIMM RAM modules are not compatible with the iMac computers. If a customer uses an EDO SO-DIMM, the unit will boot fine but will not show any RAM increase in the “About this Computer” window.
Basics Memory - 4 9 board also contains a video memory expansion slot that accepts a Small Outline DIMM (SO-DIMM) to increase video memory up to a maximum of 6 MB. Apple supports a 4 MB SGRAM SO-DIMM that is 32-bit wide, 144-pin, fastpaged, 83 MHz/12 ns cycle time or faster. Important: Use only SGRAM SO-DIMMs. Never use the 256K or 512K video memory DIMMs used in older Macintosh computers.
Basics Memory - 5 0 Views
Basics Front View - 5 1 Front View
Basics Rear View - 5 2 Rear View
Basics Left Side View - 5 3 Left Side View
Basics Right Side View - 5 4 Right Side View
Basics Internal Locator - 5 5 Internal Locator
Basics iMac Logic Board - 5 6 iMac Logic Board Processor Card *Modem Connector *Power Filter Connector CUDA Reset Button J1 J18 Modem J19 J20 SGRAM Slot Graphics Chip Product ID Label Ethernet USB Speakers Microphone J6 IrDA Connector Battery J14 J16 J17 J13 J15 Audio Video Hard Drive CD-ROM HD Power Connector Connector Connector Connector Connector *(Connector on underside of Logic Board)
Basics I/O Panel - 5 7 I/O Panel Sound In Type A Ports Sound Out (USB) Ethernet Reset Interrupt Modem
Basics I/O Panel - 5 8 Repair Strategy/Warranty
Basics Strategy and Ordering - 5 9 Strategy and Ordering The iMac computer is to be serviced through module exchange and parts replacement. Apple Computer offers standard carry-in service only on the iMac computers (with the exception of US customers who purchase the AppleCare Service Plan, covered later in this section). Apple Service Providers planning to support the computer systems covered in this manual may purchase Service modules and parts to develop servicing capability.
Basics Strategy and Ordering - 6 0 Large businesses, universities, and K-12 accounts must provide a purchase order on all transactions, including orders placed through the AppleOrder (US only) or ARIS (Canada only) systems. USA Ordering US Service providers not enrolled in AppleOrder may fax their orders to Service Provider Support (512-9088125) or mail them to Apple Computer, Inc.
Basics Strategy and Ordering - 6 1 For US inquiries, please call Service Provider Support at 800-919-2775 and select option #1. Canadian Ordering Canadian Service providers not enrolled in ARIS may fax their orders to Service Provider Support in Canada (1800-903-5284). For Canadian inquiries, please call Service Provider Support (800-217-9517).
Basics Warranty - 6 2 Warranty Following are the details of the warranty/AppleCare program for the US and Canada. US Only The iMac computers are covered under the Apple One-Year Limited Warranty. The AppleCare Protection Plan is also available for these products. Service Providers are reimbursed for warranty and AppleCare Protection Plan repairs. For pricing information, refer to Service Price Pages.
Basics Warranty - 6 3 Canada Only The iMac computers are covered under the Apple One-Year Limited Warranty. The AppleCare Protection Plan is also available for these products. Service Providers are reimbursed for warranty and AppleCare Protection Plan repairs. For pricing information, refer to Service Price Pages.
K Service Source Specifications iMac
Specifications Introduction - 1 Introduction Specifications information for this product can be found in the Spec Database, which you can access at Service Source Online (http://service.info.apple.com) or on Service Source CD. Spec Database at Service Source Online From the Service Source Online home page, click Troubleshoot and Repair to access the main repair procedures page.
K Service Source Troubleshooting iMac
Troubleshooting General - 1 General
Troubleshooting General/ Block Diagram - 2 Block Diagram The following illustration provides an overview of the iMac internal components and shows how they are connected.
Troubleshooting General/ Power Flow - 3 Power Flow Power is controlled in the iMac system by the power supply board. Once the unit is plugged in, power flows from the AC outlet at the wall to the AC inlet on the power supply board. From there, the power flows through the power filter board and on to the analog/video board, the logic board, and all its attached components. Click here to view an animation of how power flows through the iMac.
Troubleshooting General/ Testing for Power - 4 Testing for Power The iMac requires trickle voltage (+5 TRKL) in order to poweron. If you are experiencing power problems in the iMac unit, you will want to test for trickle power at various points in the system to pinpoint the location of the problem and to determine whether or not the power supply is functioning normally. If you have trickle power in the system, the odds are your power supply is OK.
Troubleshooting General/ Testing for Power - 5 Plug in the computer, but leave the iMac powered OFF. Ground the black probe on the volt meter (by inserting it into the metal chassis). With one hand behind your back, touch the red probe on the volt meter to the positive lead of capacitor C28 on the logic board (see the photograph on the next page) to see if you have +5V on the logic board. A +5V reading on the logic board means the power supply is providing the necessary trickle voltage to logic board.
Troubleshooting General/ Testing for Power - 6 At the Power Supply to Power Filter Cable First remove the bottom access cover to reach the cables feeding into the logic board/mass storage chassis. Note: You will need a volt meter to test for power at the power supply to power filter cable. Refer to the picture below to locate the necessary test point referenced in the following procedure. Unplug the power supply to power filter cable from the back side of the logic board/mass storage chassis.
Troubleshooting General/ Testing for Power - 7 At the Power Supply Board Note: The procedure below tests for +5 V on the original iMac power supply board, 661-2081. Refer to the procedure on the next page to test for +5 V on the Version 2 (661-2167) power supply board. First remove the top access cover and then remove the CRT EMI shield to reach the power supply board. ± Warning: In this next procedure, the power supply will be exposed and the unit plugged in.
Troubleshooting General/ Testing for Power - 8 Note: The procedure below tests for +5 V on the Version 2 (6612167) power supply board. First remove the top access cover and then remove the CRT EMI shield to reach the power supply board. ±Warning: In this next procedure, the power supply will be exposed and the unit plugged in. Use extreme caution and avoid touching the exposed power supply to avoid any shock hazard when working on an open unit.
Troubleshooting General/ Testing for Power - 9 At the Power Supply Board Fuse First remove the top access cover and then remove the CRT EMI shield to access the power supply board. ±Warning: You must unplug the iMac to test do a continuity test at the power supply board fuse. Note: You will need an ohm meter do a continuity test on the power supply board fuse. Refer to the picture on the next page to locate the necessary test point referenced in the following procedure.
Troubleshooting General/ The Cuda Chip - 1 0 The Cuda Chip The Cuda is a microcontroller chip. Its function is to: • Turn system power on and off. • Manage system resets from various commands. • Maintain parameter RAM (PRAM). • Manage the real-time clock. Many system problems can be resolved by resetting the Cuda chip (see the Symptom/Cure tables for examples). Press the Cuda reset button on the logic board to reset the Cuda chip.
Troubleshooting General/ Resetting the Logic Board - 1 1 Resetting the Logic Board Resetting the logic board can resolve many system problems (see the Symptom/Cure tables for examples). Whenever you have a unit that fails to power up, you should follow this procedure before replacing any modules. 1. Unplug the computer. 2. Disconnect the cable that runs from the power supply to the power filter board on the bottom side of the logic board/mass storage chassis. 3.
Troubleshooting General/ Power-On Self Test - 1 2 Power-On Self Test There is a power-on self test that resides in the ROM of the iMac. This test automatically runs whenever the iMac is powered on after being fully shut down (the power-on self test does not run if the machine is only restarted). If a problem is detected during the test, you will not hear a normal startup chime. Instead, the system will beep as explained below.
Troubleshooting General/ Video Flow - 1 3 Video Flow Video signals begin on the logic board at connector J16 and travel to connector J2 on the A/V interconnect board. The video signals then travel out from connector J5 (on the opposite side of the A/V interconnect board) and continue on via the internal RGB cable to P301 on the analog/video board. From there, the signals are transmitted to the CRT where they are displayed on the screen.
Troubleshooting General/ Sound Out Flow - 1 4 Sound Out Flow The iMac has three sound out paths: to the built-in speakers, to the sound output jack, and to the headphone jacks. To transmit sound out the internal speakers, the sound signals must travel (via the short internal audio cable) from the J14 audio connector on the logic board to the J1 connector on the A/V interconnect board. From there, the signals are transmitted to the J6 connector on the other side of the A/V interconnect board.
Troubleshooting General/ HFS Plus Formatted Drives - 1 5 HFS Plus Formatted Drives The hard drive in the iMac is formatted with HFS Plus (also referred to as Mac OS Extended format). It is important to note that Norton Utilities version 3.5 is not compatible with HFS Plus (or Mac OS Extended format), and in fact, can destroy data on the hard drive. Norton Utilities version 3.5.3 or 3.5.2 will not attempt to repair a drive formatted with Mac OS Extended format and versions 3.5.
Troubleshooting General/ Testing the Modem - 1 6 Testing the Modem The iMac ships with ClarisWorks (a.k.a. AppleWorks) software, which can be used to test the iMac modem connection. You should run this test if the modem is not able to dial out. To perform this test: 1. Locate and launch ClarisWorks. (Version 5.0 ships with the iMac computer.) 2. From the ClarisWorks New Document window, select Communications and click OK. You will be presented with an untitled communications document. 3.
Troubleshooting Symptom Charts/ How to Use the Symptom Charts - 1 7 Symptom Charts How to Use the Symptom Charts The Symptom Charts included in this chapter will help you diagnose specific symptoms related to the Power Macintosh G3/ Macintosh Server G3 (Blue and White) product. Because cures are listed on the charts in the order of most likely solution, try the cures in the order presented. Verify whether or not the product continues to exhibit the symptom. If the symptom persists, try the next cure.
Troubleshooting Symptom Charts/ Video Problems - 1 8 7 Yes: Replace the power supply to power filter cable. No: Go to next step. Possible bad power supply board. Replace the power supply board. Video Problems No video, the screen is either completely black, or you will see horizontal rolling lines. There will be power to the system, however, which is evidenced by an illuminated amber LED, and a running fan. 1. Reset parameter RAM.
Troubleshooting Solid gray screen, however, normal startup boot chime, power LED on, and the fan is running. Symptom Charts/ Video Problems - 1 9 1 Reset parameter RAM. Hold down
Troubleshooting Distorted video. Screen geometry is out of adjustment or screen is out focus. Symptom Charts/ Video Problems - 2 0 1 2 3 A a thin, white horizontal line scrolls from top to bottom, or bottom to top on the iMac display. 1 2 Adjust the focus using the Display Adjustment Utility on the MacTest Pro CD. (See “Focus” in the iMac Adjustments chapter for instructions.) Adjust the screen geometry using the Display Adjustment Utility on the MacTest Pro CD.
Troubleshooting A predominant color tint or color covering the screen. Symptom Charts/ Video Problems - 2 1 1 2 3 4 5 Erroneous text or characters appear on the screen 1 2 3 Verify that the iMac unit is not near other equipment (such as speakers, radios, phones, fluorescent lighting, magnets, or other electronic equipment) that could affect the video display. If necessary, move the iMac computer to another area and restart the unit.
Troubleshooting Symptom Charts/ Error Beeps - 2 2 Error Beeps If you hear from one to five error beeps at startup with no boot chime, you have a hardware problem. 1 2 3 4 5 Do you hear one error beep at startup? Yes: Follow these steps to resolve the problem: - Reseat the SDRAM and try again - If no SDRAM is present, install a known-good SDRAM SODIMM in the top slot and try again. - If DRAM is present, replace it (one DIMM at a time, starting with the top DIMM slot) with a known-good SDRAM SO-DIMM.
Troubleshooting Symptom Charts/ Memory Error Dialog Box - 2 3 Memory Error Dialog Box An error dialog message appears pertaining to memory after you have a successful startup sequence Run Mac TestPro to locate the bad SDRAM. Replace the SDRAM with a known-good SO-DIMM. A flashing question mark appears on the screen during startup. 1 Flashing Question Mark Corrupted system software or software drivers. Boot from the system CD that came with the unit.
Troubleshooting Symptom Charts/ Can’t Wake From Sleep - 2 4 Can’t Wake From Sleep Computer cannot be brought out of “sleep” mode by pressing a key on the keyboard. The problem is usually evident by a black screen and a Green or Amber LED. 1 2 3 Is the front LED green? Yes: Replace the Analog/Video Board (exchange like-for-like, there are two versions of this board) No: Go to next step Reinstall System Software.
Troubleshooting Symptom Charts/ System Hangs/Freezes During Boot - 2 5 System Hangs/Freezes During Boot System begins a normal startup process with a boot chime and normal display, but then freezes before the Finder appears. 1 Boot with Extensions off by holding down the Shift key during startup. (See TIL article #14343 for more information on possible Extension conflicts.
Troubleshooting Symptom Charts/ Networking Problem - 2 6 7 Replace the logic board. Networking Problem Unable to switch to the Ethernet network option in the control panel or unable to see any network devices. 1 2 3 4 5 Wrong option selected in the Control Panel. Open the Network control panel and select the Ethernet option. Are you able to select the Ethernet option? Yes: Verify that you can now see devices on the network. If the problem persists, go to the next step. No: Go to next step.
Troubleshooting Symptom Charts/ CD-ROM Not Showing on Desktop/Can’t Open CD-ROM Not Showing on Desktop/Can’t Open CD Unable to see the CD on the desktop or to open a CD that is loaded into the drive. Note: A certain amount of CD-ROM drive vibration is normal. If the drive is vibrating loudly use the iMac CD Update v.10 to update the firmware on your CD-ROM drive. Refer to the following symptom “CD-ROM Vibration” for additional information. 1 2 3 4 5 6 7 Try using a known-good compact disc.
Troubleshooting Symptom Charts/ CD-ROM Door Not Latching Closed - 2 8 CD-ROM Door Not Latching Closed After manually ejecting CDs from the CD-ROM tray (of both /A and /B models), the eject mechanism sometimes does not reset into a position that allows the tray door to close properly. 1 2 3 Try using a known-good compact disc. Reset the eject mechanism with a paperclip to correct the problem. Refer to “Resetting CD-ROM Eject Mechanism” in Additional Procedures. Replace the CD-ROM drive.
Troubleshooting Symptom Charts/ Hard Drive Problems - 2 9 Hard Drive Problems Hard drive doesn’t spin or the hard drive doesn’t appear on the desktop. 1 2 Corrupted drivers. Can you see the hard drive using Drive Setup 1.5.1? Yes: Use Drive Setup 1.5.1 to reinstall the software drivers for the hard drive. If the problem persists, use Drive Setup 1.5.1 to reinitialize the hard drive. (See TIL article # 22206 for instructions.) Warning: You will lose all data on the hard drive when you reinitialize it.
Troubleshooting Symptom Charts/ Sound Out Problems - 3 0 Sound Out Problems No sound coming from the internal speakers, external speakers (connected via the I/O panel to the speaker connector on the logic board), or both. 1 2 3 4 5 6 7 8 9 First, disconnect any external microphones, speakers or headphones. Next, verify that volume setting in Control Panel is adequate and that mute is not checked. Test the for sound coming from the internal speakers.
Troubleshooting Symptom Charts/ Sound In Problems - 3 1 Sound In Problems 1 2 3 4 Audio recording quality is poor, a high level of background noise is noticeable, or no sound is recorded. Open the Simple Sound Control Panel (found under the Apple Menu). Select CD Quality under the Sound menu to minimize noise on the internal microphone. Did this solve the problem? Yes: If the initial sound in problem was with the sound control panel; the problem is solved. No: Go to next step.
Troubleshooting Symptom Charts/ IrDA Problems - 3 2 IrDA Problems Two infraredequipped units are unable to communicate via their infrared communication panels to transfer data or commands. 1 2 Clean infrared window with soft, lint-free cloth. Make sure units are spaced greater than three feet but less than six feet and at less than a twenty degree angle. 3 Verify infrared signal is being received by host computer. 4 Open the IrDA control panel and make sure “Auto Connect” is selected.
Troubleshooting Symptom Charts/ USB Problems - 3 3 USB Problems USB problems refer to symptoms or issues that may occur with external USB devices that are attached to the iMac. This could include Apple and/or third-party USB devices. 1 Does the unit have the iMac Update 1.0? Ways to tell: - Run Apple System Profiler. In the Device screen, the USB version number in the upper left corner should be greater than 1.0 - Do a Get Info on the OS ROM file in the system folder.
Troubleshooting Symptom Charts/ USB Problems - 3 4 gives steps to remedy the problem. USB driver missing. This error message indicates the device's driver is missing. Customers will need to check the instructions that came with the device and install the Mac OS driver. 4 5 6 Bad USB connector. Connect the problem device directly into one of the iMac USB ports or, if it’s already connected to one of the iMac USB ports, switch it to the other port. Bad USB device. Replace the USB device.
Troubleshooting Symptom Charts/ Cursor Problems - 3 5 Cursor Problems The cursor moves on the screen, but clicking the mouse has no effect or double-clicking the mouse does not open an application, disk or server. 1 2 3 4 5 6 The mouse occasionally loses its ability to track in one direction. 1 2 Reset parameter RAM. Hold down
Troubleshooting Symptom Charts/ Networked Printer Problems - 3 6 Note: The iMac Update 1.0 improves the customer experience with many USB peripherals. Apple recommends every iMac customer install this update. The iMac Update 1.0 software is available at no charge through Apple's Software Update Web site http://www.apple.com/swupdates. Refer to TIL #44005 for additional information. 2 3 4 5 6 7 8 9 Verify with the manufacturer of the printer that it is iMac compatible.
Troubleshooting Symptom Charts/ Networked Printer Problems - 3 7 5 6 iMac enablers) and/or the network and printer software. Refer to the “Network Problems” troubleshooting table earlier in this chapter. Replace the logic board.
Troubleshooting Symptom Charts/ Modem Not Recognized - 3 8 Modem Not Recognized The internal modem is not recognized 1 2 3 Needed extensions or CCL files are not installed or are corrupt. Are the correct CCL and extension files installed? ( Note: You will need the iMac Modem Extension and the iMac internal modem CCL.) Yes: The CCL or extension may be corrupt. Reinstall the CCL and modem extension. If the problem persists, reinstall the system software and try again.
Troubleshooting Modem Cannot Dial Out Symptom Charts/ Modem Dialing Problems - 3 9 1 2 3 4 Open the modem control panel and make sure the modem type selected is iMac Internal 56K, (or Apple iMac internal modem in the Earthlink setup screen) the sound is On, and the dialing is set to Tone. At this point, leave the ignore dial tone setting unselected. Verify you have the correct CCL selected. If the problem persists, reinstall the CCL file.
Troubleshooting Symptom Charts/ Modem Not Connecting - 4 0 Modem Not Connecting Error Launching a Browser If more than one browser is installed, check to see if the problem occurs with both browsers. If necessary, reinstall the browser software. Note: Internet Explorer 4 and greater needs to be installed and not just drag copied.
Troubleshooting Symptom Charts/ Modem Dropping Connection - 4 1 2 3 4 speed.) If the problem continues, contact the phone company to report the bad phone line. With call waiting active, an incoming call can interrupt the connection. Disable call waiting using AT commands placed in the init string of the dialup application. Usually the string is *70. Servers sometimes develop problems that disconnect users without explanation. Try calling back later or use an alternate number if one is available.
Troubleshooting Symptom Charts/ Modem Performance Issues - 4 2 Modem Performance Issues Slow Response 1 2 When using an ISP, users need to remember that the ISP only has a limited amount of bandwidth to the Internet. If a large amount of people are dialing in, individual's speeds will be affected. Refer to “Modem Performance Issues” in the Basics chapter for an overview of factors that can affect modem performance.
K Service Source Take Apart iMac
Take Apart - 1 General
Take Apart Tools - 2 Tools The following tools are recommended for procedures in this chapter: • Spring hook removal tool (922-1547) to remove the processor card • Plastic screwdriver (922-3504) to release tabs on plastic housing • Jeweler’s Phillips screwdriver, size 00 mm to remove CD-ROM bezel • CRT discharge tool • Nut driver or pliers to remove thumbscrews on the audio/video interconnect board • Needlenose pliers • Phillips screwdriver • ESD mat
Take Apart Tools - 3 Procedures
Take Apart Lower Access Cover - 4 Lower Access Cover Position the computer face down, resting the CRT on an ESD mat or other soft surface.
Take Apart Lower Access Cover - 5 1. Loosen captive screw on access cover. Note: The captive screw is not included when ordering the lower access cover. To order a captive screw, order part number 922-3630.
Take Apart Lower Access Cover - 6 2. Using the handle, quickly jerk the lower access cover up and towards you. Note: The cover is difficult to remove. An abrupt tug upward is required to remove the cover.
Take Apart Lower Access Cover - 7 Replacing the Lower Access Cover 1. Align the bottom of the lower access cover inside the bottom housing plastics. 2. Align the tabs (one on each side) on the access cover with the holes on the housing. To view a QuickTime movie that shows removing and replacing the lower access cover, click here.
Take Apart Logic Board/Mass Storage Chassis - 8 Logic Board/Mass Storage Chassis Before you begin: • Position the computer face down, resting the display on an ESD mat. • Remove the lower access cover.
Take Apart Logic Board/Mass Storage Chassis - 9 1. Remove the two screws at the top of the logic board/mass storage chassis. 2. Disconnect the screw clamp and the audio, RGB, main power, and IrDA cables.
Take Apart Logic Board/Mass Storage Chassis - 1 0 3. Using the handle, pull up on the chassis and slide the logic board/mass storage chassis out of the unit.
Take Apart Logic Board - 1 1 Logic Board Product ID Label Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis Note: Identify the 6612113 and the 661-2061 logic boards by the graphics controller chip at location U12. The 661-2061 logic board has the ATI Rage IIc chip at U12.
Take Apart Logic Board - 1 2 chip at U12. The 661-2113 logic board on the 266 MHz Lime, Grape, Blueberry, Strawberry, and Tangerine iMacs will have the ATI Rage Pro Turbo chip at location U12. The 661-2113 board is not backward compatible with iMac Logic board, 6612061. Refer to the Service Parts database for more information.
Take Apart Logic Board - 1 3 1. Disconnect all the cables on the logic board. 2. Remove the five screws that secure the logic board to the chassis.
Take Apart Logic Board - 1 4 3. Remove the two flathead screws that secure the I/O panel to the chassis. 4. Tilt the I/O panel away from the chassis to remove the logic board. Note: The metal tabs on the I/O panel hook into the chassis. These tabs allow the I/O panel to tilt.
Take Apart Logic Board - 1 5 5. Holding the logic board by its edges, gently lift the logic board to disconnect it from the power filter board located underneath. Replacement Note: Before returning the logic board to Apple, remove the heatsink, CPU shields, processor card, modem card, plastic modem standoff, and read the information on the next page about the Ethernet hardware ID label.
Take Apart Logic Board - 1 6 Ethernet Hardware ID Label The replacement logic board ships with an Ethernet hardware ID label. You must affix the new label over the existing Ethernet label, which is located above the serial number. Do NOT cover up the serial number information that is printed on the existing Ethernet label.
Take Apart Logic Board - 1 7 Reconnecting Logic Board Cables When reconnecting cables to the logic board, make sure the CD-ROM data cable runs underneath the metal bridge. The remaining cables rest on top of the metal bridge.
Take Apart Processor Card - 1 8 Processor Card Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis
Take Apart Processor Card - 1 9 1. Remove the top shield from the processor card.
Take Apart Processor Card - 2 0 ±Warning: The heatsink may be hot to the touch if the computer has been on for awhile. 2. Pry the heatsink clip off the processor shield frame.
Take Apart Processor Card - 2 1 3. Lift the heatsink off the processor card.
Take Apart Processor Card - 2 2 4. Pry the processor card from the logic board connectors. This can be done with a spring hook removal tool or carefully with the heatsink clip as shown in the graphic. Note: Remove the heatsink and SDRAM before returning the processor card to Apple. Do NOT remove the rubber gap filler on the microprocessor chip.
Take Apart Modem - 2 3 Modem Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • I/O panel • Logic board Note: A pair of needlenose pliers is required to remove the modem from the modem standoff.
Take Apart Modem - 2 4 1. Turn the logic board over resting it on an ESD mat. 2. Squeeze the modem standoff with a pair of needlenose pliers to remove the modem from the logic board. Note: If you are replacing the modem, keep the plastic standoff. Install the standoff on the replacement modem. If you are returning the logic board to Apple, remove the modem and the standoff. Install them on the replacement logic board.
Take Apart I/O Panel - 2 5 I/O Panel Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis
Take Apart I/O Panel - 2 6 1. Remove the two screws that secure the I/O panel to the chassis.
Take Apart I/O Panel - 2 7 2. Tilt the I/O panel outward and unhook the I/O panel tabs from the chassis.
Take Apart SDRAM - 2 8 SDRAM Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • Processor top shield • Processor card Note: There are two expansion slots (one on top and one underneath) for RAM modules on the processor card. This picture shows the RAM slot on the underside. The procedure is the same for the top slot.
Take Apart SDRAM - 2 9 1. Pull the metal snaps on either side of the RAM DIMM to the sides. The connector will tilt up. 2. Pull the RAM DIMM out. Note: Remove installed SDRAM from the processor card before returning the processor card to Apple.
Take Apart Processor Shield Frame - 3 0 Processor Shield Frame Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • Processor top shield • Processor card
Take Apart Processor Shield Frame - 3 1 1. Remove the one screw that holds the shield frame to the logic board. 2. Unhook the tabs that attach the shield frame to the logic board. This may require jiggling the shield frame back and forth to unhook the tabs. Note: Remove the processor shield frame, the processor top shield, the processor card, the modem, and modem standoff before returning the logic board to Apple.
Take Apart CD-ROM - 3 2 CD-ROM Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis Important: Apple recently (7/99) released a new 24x CD-ROM drive service part for five-color iMacs with 266MHz processors or faster only.
Take Apart CD-ROM - 3 3 233MHz Bondi Blue iMacs. Although the two iMac CDROM drives are identical in fit and performance, the drives are not interchangeable. The 24x CD-ROM, Version 2, may cause data loss if used in the 233MHz Bondi Blue iMac. To ensure proper compatibility, please order the correct CD-ROM drive when servicing an iMac.
Take Apart CD-ROM - 3 4 CD-ROM Part Numbers • If you are replacing a 24x CD-ROM drive in a Bondi Blue iMac (233MHz), order the 661-2076 CDROM drive. • If you are replacing a 24x CD-ROM drive in a fivecolor iMac (266MHz or greater), order 6612207, CD-ROM drive, 24x, Ver. 2.
Take Apart CD-ROM - 3 5 1. Push the CD-ROM carrier inward to release the springloaded carrier. 2. Lift the CD-ROM drive out of the chassis. 3. Disconnect the CD-ROM data cable and lift the CD-ROM from the chassis. Note: The CD-ROM drive, carrier, and interconnect board are one service part. The bezel is a separate service part.
Take Apart CD-ROM - 3 6 Replacing the CD-ROM Carrier 1. The spring catch on the back of the CD carrier has to hook on to the spring that rests on top of the hard drive. Review the hard drive take-apart procedure in this chapter to see a photograph of the spring.
Take Apart CD-ROM - 3 7 2. Ensure the metal tabs on the CD carrier feed into the tab holes on the chassis to secure the CD-ROM drive in place.
Take Apart CD-ROM - 3 8 Removing the CD-ROM Bezel No primary steps are required before you begin this procedure. Note: The CD-ROM bezel is a separate service part because the bezels come in different colors. If replacing the CD-ROM, remove the bezel and place the bezel on the new CD-ROM assembly. Refer to the Service Parts Database for more information.
Take Apart CD-ROM - 3 9 1. Open the CD-ROM drive drawer by gently pushing a paper clip into the access hole.
Take Apart CD-ROM - 4 0 2. Rest the iMac on its side. 3. Pull the CD-ROM drawer out to access the micro screw on the underside of the CD-ROM drive. 4. Remove the micro screw. Note: There are three tabs that hold the CD bezel in place (you can’t see them in this photo). Refer to the graphic on the next page.
Take Apart CD-ROM - 4 1 5. Press the three tabs and gently remove the bezel from the CD-ROM mechanism.
Take Apart Hard Drive - 4 2 Hard Drive Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis
Take Apart Hard Drive - 4 3 1. Remove the two screws securing the hard drive carrier to the chassis. The CD-ROM doesn’t have to be removed completely to access the hard drive, as shown in the photo. Replacement Note: Notice the spring resting on top of the hard drive. The CD-ROM carrier attaches to the spring, making the CD-ROM spring-loaded in the chassis.
Take Apart Hard Drive - 4 4 2. Holding on to the hard drive carrier, push the carrier back to free the carrier from the chassis. Note: Pushing the carrier back releases two metal tabs on the underside of the hard drive carrier. Refer to “Hard Drive Carrier Replacement” for photo and information. 3. Lift the hard drive carrier from the chassis.
Take Apart Hard Drive - 4 5 4. Remove the hard drive data cable, power cable, and four screws securing the HDA to the carrier. 5. Return drives without cables or carriers. Exchange hard drive modules in Apple packaging. Failure to comply with this requirement may result in a packaging noncompliance charge. Refer to the parts database for more information.
Take Apart Hard Drive - 4 6 Replacing the Hard Drive Carrier 1. Route the hard drive and CD-ROM cables under the metal support bridge on the chassis. 2. Slide the hard drive carrier tab (one tab on each side) into the chassis tab slot. 3. Pull the hard drive/ carrier forward. Make sure both tabs slide into the tab slots on the logic board/mass storage chassis frame.
Take Apart Power Filter Board - 4 7 Power Filter Board Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis
Take Apart Power Filter Board - 4 8 1. Remove the two screws on the power filter board. 2. Lift the power filter board off the chassis. Note: If the logic board is still in place, you may feel resistance when prying the power filter board off the logic board connector.
Take Apart Fan - 4 9 Fan Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis ±Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, discharge the CRT and review CRT safety in Bulletins/Safety.
Take Apart Fan - 5 0 1. Remove the two screws from the fan bracket.
Take Apart Fan - 5 1 2. Disconnect the fan cable from the analog board. Note: The fan cable may be tie-wrapped to the chassis. 3. Remove the fan from unit. Replacement Note: Due to space constraints, the analog board will have to be removed to reconnect the fan at P508 (on the analog board). Also, install the fan so that the cable rests in the cut-out notch on the chassis.
Take Apart Audio/Video Interconnect Board - 5 2 Audio/Video Interconnect Board Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • Logic board • I/O panel • CD-ROM • Hard Drive
Take Apart Audio/Video Interconnect Board - 5 3 1. Remove the silver screw from the EMI shield on the audio/video interconnect board. Note: There are two versions of the audio/video interconnect board; 9223589 (with an IrDA connector) and 922-3741 (without an IrDA connector). The /A and /B iMacs use the 992-3589, with IrDA. The five-colored iMacs do not use the IrDA technology. These sytems use the 922-3741 board without IrDA.
Take Apart Audio/Video Interconnect Board - 5 4 2. Remove the two thumbscrews (with a nut driver) and the one phillips screw from the outside of the board. Replacement Note: Ensure that the audio/ video interconnect board ports and tabs are positioned correctly into the chassis holes.
Take Apart Audio/Video Interconnect Board - 5 5 3. Disconnect the cables on the audio/video interconnect board. 4. Pull the board up and out of the chassis. Note: Remove all cables before returning the board to Apple.
Take Apart Bottom Rear Housing - 5 6 Bottom Rear Housing Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • Front lower panel Note: The bottom rear housing includes the flip foot. The computer should never be picked up by the flip foot. If needed, the flip foot is also available separately. Refer to the parts database.
Take Apart Bottom Rear Housing - 5 7 1. Remove the eight screws. Note: Four screws are fine-threaded screws that screw into metal; the four other screws are coarse-threaded screws that screw into plastic. One screw is located inside the I/O panel door.
Take Apart Bottom Rear Housing - 5 8 2. Press down on the tab and pull the bottom housing off the computer.
Take Apart Front Lower Panel - 5 9 Front Lower Panel Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis
Take Apart Front Lower Panel - 6 0 1. Remove the eight screws on the bottom housing. Note: Four screws are fine-threaded screws that screw into metal; the four other screws are coarse-threaded screws that screw into plastic. One screw is located inside the I/O panel door.
Take Apart Front Lower Panel - 6 1 2. Press down on the tab at the top of the housing and pull the bottom housing toward you. Note: Be careful with the tabs; see the next step.
Take Apart Front Lower Panel - 6 2 3. Position the iMac on its side and gently release the front lower panel tabs from the tab slots. To remove the front lower panel from the bottom housing, continue with the procedures.
Take Apart Front Lower Panel - 6 3 4. Push in on the front lower panel tabs to remove the front lower panel from the bottom housing.
Take Apart Speakers - 6 4 Speakers Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • Bottom rear housing
Take Apart Speakers - 6 5 1. Remove the speaker screw. 2. Disconnect the speaker cable.
Take Apart Speakers - 6 6 3. Lift speaker up and out of the chassis frame. Note: The speakers are keyed left and right. Replacement Note: Make sure the speaker cable is repositioned through the chassis hole if you removed or replaced internal chassis cables, the internal CRT chassis frame, or replaced the CRT.
Take Apart IrDA Board - 6 7 IrDA Board Before you begin, remove the following: • Lower access cover • Logic board/mass storage chassis • Bottom rear housing
Take Apart IrDA Board - 6 8 1. Remove the screw on the IrDA bracket; remove the bracket. 2. Remove IrDA cable from the IrDA board. 3. Remove the screw attaching the IrDA board to the chassis. 4. Lift the IrDA board up and out of the inner bezel.
Take Apart Headphone/Power Board - 6 9 Headphone/Power Board Before you begin remove the following: • Lower access cover • Main logic/mass storage chassis • Bottom rear housing • Front lower panel
Take Apart Headphone/Power Board - 7 0 1. Disconnect the two cables (three-wire LED cable and multi-colored audio cable) from the headphone/power board. 2. Remove the two screws. 3. Lift the headphone/ power board from chassis frame. Note: You may have to wiggle the board a bit and assist from underneath by pushing the board up and out of the chassis frame.
Take Apart Front Outer Bezel - 7 1 Front Outer Bezel Before you begin, remove the front lower panel (which is attached to the bottom housing).
Take Apart Front Outer Bezel - 7 2 1. Remove two screws on the front outer bezel.
Take Apart Front Outer Bezel - 7 3 2. With the CRT facing you, use a plastic tool to push in the tabs on the left side and then on the right side to release the tabs from the bezel holes. Start pushing the tabs in from the bottom left corner and work your way to the top. Note: Be careful not to damage the plastics. 3. Grab the bezel from the bottom, and pull the bezel forward and up to remove it.
Take Apart Front Inner Bezel - 7 4 Front Inner Bezel Before you begin, discharge the CRT and remove the following: • Lower access cover • Main logic/mass storage chassis • Bottom rear housing • Front lower panel • Front outer bezel • Top rear housing • CRT EMI shield • Analog/video board • Power supply
Take Apart Front Inner Bezel - 7 5 ±Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. 1. Remove the eight screws attaching the inner CRT bezel frame to the inner plastic bezel. There are four screws on each side. 2. Disconnect the microphone cable.
Take Apart Front Inner Bezel - 7 6 3. Lift the CRT bezel frame away from the inner bezel.
Take Apart Front Inner Bezel - 7 7 4. Lift the CRT off the front inner bezel. 5. The inner bezel and microphone remain. Remove the microphone from the front inner bezel.
Take Apart Top Rear Housing - 7 8 Top Rear Housing Before you begin, remove the following: • Front lower panel • Front outer bezel • Lower access cover
Take Apart Top Rear Housing - 7 9 1. Remove the the eight bottom housing screws.
Take Apart Top Rear Housing - 8 0 2. Press down on the tab and pull the bottom housing off the computer.
Take Apart Top Rear Housing - 8 1 3. With a jeweler’s screwdriver, pry off the two screw plugs on the top housing. Note: The screw plugs are keyed right and left. 4. Remove the two silver screws under the screw plugs.
Take Apart Top Rear Housing - 8 2 5. Note: There are tab holes on both sides of the front inner bezel To remove the top rear housing, hold the housing near the bottom and pull the housing up to unhook the tabs from the tab holes (start on one side). Then, pull the sides out and back to release the entire top rear housing (see the next graphic).
Take Apart Top Rear Housing - 8 3 6. Lift the top rear housing off the computer.
Take Apart EMI Shield - 8 4 EMI Shield ± Warning: This product contains high voltage and a high-vacuum picture tub. Review CRT safety in Bulletins/Safety.
Take Apart EMI Shield - 8 5 1. Remove the ten screws on the EMI shield. 2. Pull out and up on the EMI shield to remove it from the chassis. Replacement Note: Position the tabs on the top of the the EMI shield first, then line up the remaining screws holes.
Take Apart Analog/Video Board - 8 6 Analog/Video Board ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, discharge the CRT. Note: There are two versions of the analog/video board. Identify which version you have before replacing a module. Exchange like-for-like. Refer to the Service Parts Database and the wiring diagrams located in the Exploded View chapter.
Take Apart Analog/Video Board - 8 7 Ver. 2 board is not backwards compatible and must be used with the other Ver. 2 service parts.
Take Apart Analog/Video Board - 8 8 Note: The procedures for removing the two versions of the analog/video board are very similar. The following procedures are for the 6612080 analog/video board.
Take Apart Analog/Video Board - 8 9 1. Gently pull the video board off the CRT neck. 2. Disconnect P301, P306, and the black ground wire on the video board. Note: Leave P302, P303, and the red wires connected to the video board. 3. Carefully pull the video board straight off the neck of the CRT.
Take Apart Analog/Video Board - 9 0 4. Remove the three screws on the analog board. Important: When replacing the analog board or the CRT, be careful not to bump the factory-set magnets located on the neck of the CRT. Changing these settings may adversely affect the quality of the video and require you to replace the CRT.
Take Apart Analog/Video Board - 9 1 5. Disconnect P702, P505, P514, and P508 and a 4-pin multi-color CRT cable (not shown). Don’t disconnect P506 and P502, the two gray cables. Replacement Note: P506 and P502 (gray cables shown) should be returned with the board if the board is faulty.
Take Apart Analog/Video Board, Ver. 2 - 9 2 Analog/Video Board, Ver. 2 ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety Note: There are two versions of the analog/video board. Identify which version you have before replacing a module. Exchange like-for-like.
Take Apart Analog/Video Board, Ver. 2 - 9 3 diagrams for the analog/ video and power supply boards located in the Exploded View chapter. The Ver. 2 board is not backwards compatible and must be used with the other Ver. 2 service parts.
Take Apart Analog/Video Board, Ver. 2 - 9 4 The following procedure is for the 661-2166 Ver. 2 analog/video board.
Take Apart Analog/Video Board, Ver. 2 - 9 5 1. Gently pull the video board off the CRT neck. 2. Disconnect P301, P305, and the black ground wire on the video board. Note: Leave P 3 0 2 ( the red wire) and P303 (the gray cable) connected to the video board. 3. Carefully pull the video board straight off the neck of the CRT.
Take Apart Analog/Video Board, Ver. 2 - 9 6 4. Remove the three silver screws on the analog board. Important: When replacing the analog board or the CRT, be careful not to bump the factory-set magnets located on the neck of the CRT. Changing these settings may adversely affect the quality of the video and require you to replace the CRT.
Take Apart Analog/Video Board, Ver. 2 - 9 7 5. Tilt the analog board out and disconnect six cables; P702, P504, P514, P703, P506, and P701. Replacement Note: This board should have two cables on it when returned to Apple: the red permanent cable that connects the analog and video board, and the gray cable that goes from P303 on the video board to P703 on the analog board.
Take Apart Power Supply Board - 9 8 Power Supply Board ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, discharge the CRT. Note: There are two versions of the power supply board. Identify which version you have before replacing a module. Exchange like-for-like.
Take Apart Power Supply Board - 9 9 boards located in the Exploded View chapter. The Rev.2 power supply board is not backwards compatible and must be used with the other Ver. 2 service parts.
Take Apart Power Supply Board - 1 0 0 Before you begin, discharge the CRT and remove the following: • Lower access cover • Main logic/mass storage chassis • Bottom rear housing • Front lower panel • Front outer bezel • Rear top housing • EMI shield
Take Apart Power Supply Board - 1 0 1 1. Remove the three silver screws on the power supply board. Note: There are two versions of the power supply board, 6612081 (shown here) and 661-2167, Ver. 2. They must be exchanged likefor-like. Refer to the Service Parts database or the Exploded View, wiring diagram for the Rev.2 analog/video and Rev.2 Power Supply boards, for additional information.
Take Apart Power Supply Board - 1 0 2 Note: The power supply has a ground clip connected near the AC plug (not shown here). When replacing the power supply, remove the ground clip from the defective board and place it on the new service part. The ground clip does not ship with the new service part.
Take Apart Power Supply Board - 1 0 3 2. Disconnect three cables on the board; P902 (brown cable), the multi-colored power cable, and P908, the gray cable. 3. Lift the board off the chassis. Note: There is a fuse on the AC line on the power supply board. The fuse is located at F901 (near the bottom right corner of the installed power supply board as you are facing the back side of the board).
Take Apart Power Supply Board - 1 0 4 replacing the power supply board, test the fuse. Refer to the “Testing for Power” in the iMac Troubleshooting chapter for instructions on how to check the power supply board fuse. This fuse is an orderable service part and can be replaced by service providers.
Take Apart Power Supply Board, Ver. 2 - 1 0 5 Power Supply Board, Ver. 2 ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review CRT safety in Bulletins/Safety. Note: There are two versions of the power supply board. Identify which version you have before replacing a module and exchange them like-forlike.
Take Apart Power Supply Board, Ver. 2 - 1 0 6 diagrams for the Ver. 2 analog/ video and power supply boards located in the Exploded View Chapter. The Rev.2 power supply board is not backwards compatible and must be used with the other Ver. 2 service parts.
Take Apart Power Supply Board, Ver.
Take Apart Power Supply Board, Ver. 2 - 1 0 8 1. Remove the three silver screws on the power supply board. Note: There are two versions of the power supply board, 6612081 and 661-2167, Ver. 2. They must be exchanged like-for-like. Refer to the Service Parts database or the wiring diagram for the Rev.2 Analog/Video and Rev.2 power supply boards located in the Exploded View chapter.
Take Apart Power Supply Board, Ver. 2 - 1 0 9 2. Disconnect P904, P906, and P902. Connector CN1 (is hard wired to power supply) and P907 stay connected to the power supply. Note: There is a ground clip connected near the AC plug (not shown here). If replacing the power supply, remove the ground clip from the defective board and place it on the replacement module. The ground clip does not ship with the new service part.
Take Apart Power Supply Board, Ver. 2 - 1 1 0 Note: There is also a fuse on the AC line on the power supply board. The fuse is located at F901 (near the bottom right corner of the installed power supply board as you are facing the back side of the board). Before replacing the power supply board, test the fuse. Refer to the “Testing for Power” in the iMac Troubleshooting chapter for instructions on how to check the power supply board fuse.
Take Apart Power Supply Board, Ver. 2 - 1 1 1 fuse is an orderable service part and can be replaced by service providers.
Take Apart CRT - 1 1 2 CRT ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, discharge the CRT.
Take Apart CRT - 1 1 3 Note: There is a Ver. 2 CRT. Refer to the Service Parts database for additional information. The Ver. 2 CRT is not backwards compatible.
Take Apart CRT - 1 1 4 1. Remove the eight screws attaching the CRT frame to the inner plastic bezel. There are four screws on each side. Note: This graphic shows the computer without an analog/video board attached. The CRT can be removed without removing the analog and power supply boards, see “Shortcut” on the next page.
Take Apart CRT - 1 1 5 2. Lift the CRT bezel frame off the CRT. Shortcut: With the analog and power supply boards in place, remove the video board off the CRT neck. Disconnect P701 (large 4-pin connector on the analog board), P702 (3-pin cable in the upper left corner of the analog board). Remove the anode cap. Disconnect the microphone cable. Lift the CRT bezel frame and boards off the bezel.
Take Apart CRT - 1 1 6 3. Lift the CRT off the front inner bezel. Note: If you’re replacing the CRT, the ground wire should be removed from the old CRT and placed on the replacement CRT. Important: When replacing the CRT or analog board be careful not to bump the factory-set magnets located on the neck of the CRT. Changing these settings may adversely affect the quality of the video and require you to replace the CRT.
Take Apart Microphone - 1 1 7 Microphone Before you begin, remove the following: • Front lower panel • Front outer bezel • Lower access cover • Bottom rear housing • Top rear housing ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, discharge the CRT and review CRT safety in Bulletins/Safety.
Take Apart Microphone - 1 1 8 1. Disconnect the microphone connector. 2. With a needlenose pliers, lift up the rubber plug to access the microphone. 3. With needlenose pliers, gently pull the microphone out of the rubber enclosure. Note: The microphone does not ship with the rubber enclosure around the microphone.
Take Apart I/O Door - 1 1 9 I/O Door The I/O door is on the rear bottom housing. To remove the I/O door, hold the door near the tab latches and pull to release. The I/O door can be tricky to remove. Don’t hesitate to pull hard on the I/O door to unhook the tab latches. Note: There are two versions of the iMac I/O door. Refer to the Service Parts database for more information.
Take Apart I/O Door - 1 2 0 Serial Number and Ethernet Address The serial number and Ethernet hardware address are located on the inside panel of the I/O door. Replacement logic boards ship with an Ethernet label. If you replace the logic board, you must affix the new label over the existing Ethernet label (located on the I/O panel) above the serial number. IMPORTANT: Do NOT cover up the serial number information that is printed on the existing label.
Take Apart CRT Frame - 1 2 1 CRT Frame The CRT frame consists of two separate parts: the CRT bottom frame and the CRT bezel frame (top piece). All the cables shown are offered separately except for the degaussing cable, which is not offered as a service part. Note: There are two versions of the CRT bottom frame: 922-3627 and 922-3837, Ver. 2. They are not interchangeable.
Take Apart CRT Frame - 1 2 2 Before you begin, discharge the CRT and remove the following: • Lower access cover • Main logic board/mass storage chassis • Bottom rear housing • Front lower panel • Front outer bezel • Top rear housing • CRT EMI shield • Analog/video board • Power supply board • CRT • Speakers • Headphone/power board • IrDA board
Take Apart CRT Frame - 1 2 3 1. Remove the four brasscolored screws to separate the top frame from the bottom frame.R Note: Take note of the cable routing before removing/replacing any cables.
Take Apart CRT Frame - 1 2 4 2. Pull the tabs out of the catches on the CRT frame. 3. Lift the top frame up and off the bottom frame.
Take Apart CRT Frame - 1 2 5 4. The remaining frame is the CRT bottom frame. It ships without the cables and rubber plugs. Note: The cables and rubber plugs are offered separately.
Take Apart Installing a Microphone Gasket - 1 2 6 Installing a Microphone Gasket Installing the microphone gasket (922-3679) will improve audio recording quality from the internal microphone on some early production iMac computers. Refer to TIL article #58053 for additional information.
Take Apart Installing a Microphone Gasket - 1 2 7 1. Place the gasket around the microphone opening in a vertical orientation. Ensure that the microphone opening is not obstructed by the gasket.
Take Apart Installing a Microphone Gasket - 1 2 8 2. Replace the front outer bezel, taking care not to dislodge the gasket.
Take Apart Installing a Microphone Gasket - 1 2 9 3. Replace the two front bezel screws.
K Service Source Upgrades iMac
Upgrades - 1 SDRAM Before you begin, position the iMac face down on an ESD mat. 1. Remove the lower access cover.
Upgrades - 2 2. Remove the two screws at the top of the logic board/mass storage chassis and disconnect the cables and screw clamp.
Upgrades - 3 3. Using the handle, pull the main logic board/ mass storage chassis from the unit.
Upgrades - 4 4. Place the logic board/mass storage unit on an ESD mat.
Upgrades - 5 5. Remove the processor card top shield.
Upgrades - 6 6. Line up the notch in the SDRAM DIMM with the small plastic tab in the SDRAM slot. Push in on the card and then down until the two metal snaps click into place.L RAM Expansion Slot Notch Metal Tab Tab Metal Tab SDRAM Note: There are two expansion slots for RAM DIMM modules on the microprocessor board. One slot is on the top side of the processor card (as shown here) and one slot is on the underside of the processor card.
Upgrades - 7 VRAM Before you begin, position the iMac face down on an ESD mat. 7. Remove the lower access cover.
Upgrades - 8 8. Remove the two screws at the top of the logic board/mass storage chassis and disconnect the cables and screw clamp.
Upgrades - 9 9. Using the handle, pull the main logic board/ mass storage chassis from the unit.
Upgrades - 10 10. Place the logic board/ mass storage chassis on an ESD mat.
Upgrades - 11 Notch VRAM Tab VRAM Expansion Slot Metal Tab 11. Line up the notch in the SGRAM DIMM expansion card with the small plastic tab in the VRAM expansion slot. Push in on the VRAM card, and then down, until the two metal snaps click into place.
K Service Source Adjustments iMac
Adjustments Adjustment Tools - 1 Adjustment Tools The following items are needed to perform video adjustments on the iMac: • Display Adjustment Utility • a light meter The utility can be found on the Service Source CD or under the Diagnostic link found on the Troubleshooting and Repair page online at: http:// service.info.apple.com.
Adjustments Adjustment Tools - 2 Light Meter Setup This topic covers setup for three light meter models: R77, L-248, and 246. Model R77 (Apple part number 076-0310) is the newest model available. Model R77 The R77 light meter is capable of reading luminance from 10 to 1,000 footcandles (fc). Before you begin, remove the 10X multiplier plate from the lens.
Adjustments Adjustment Tools - 3 Three scales are shown on the light meter: • 200-1000 fc • 50-250 fc • 10-50 fcT Because display screen luminance typically ranges from 10 to 50 fc, take readings from the bottom scale only.
Adjustments Adjustment Tools - 4 To measure a display screen’s luminance, 1. Set the scale switch to the bottom position (to set up the 10-50 fc scale). 2. Place the lens against the middle of the screen and read the bottom scale. Note: When the light meter is not in use, slide the scale switch to its top position, and store the meter in its protective case.
Adjustments Adjustment Tools - 5 Important: If you suspect the light meter is giving false readings, verify the readings with a known-good light meter or photometer. Also check the age of the R77 light meter by its four-digit manufacturing date stamp (such as 0398 for March 1998). Caution: Dropping the meter can permanently damage its accuracy. A shock-damaged meter might read incorrectly or its pointer may not drop to zero.
Adjustments Adjustment Tools - 6 Model L-248 Lens Side Switch Read Button 1. Press the red button on the back of the light meter. If the reading is out of the red area, replace the battery. 2. Move the side switch to its upper position so that the scale reads 10 through 18. 3. Uncover the lens of the meter. Red Area Scale 4. Place the lens against the middle of the screen and press the read button to read the scale.
Adjustments Adjustment Tools - 7 Model 246 Lens Swivel Head Scale This topic covers setup for light meter Model 246. 1. Remove the metal slide, if installed, from the top of the light meter. 2. Install the white lens with the red dot. 3. Swivel the head so the lens of the meter faces the monitor. 4. Place the lens against the middle of the screen and read the scale.
Adjustments Geometry - 8 Geometry The Geometry adjustments shown are controlled via the Display Adjustment Utility. 5. Open the Display Adjustment Utility and select the Geometry window. 6. Adjust the geometry settings by moving the appropriate slider bar. 7. When done, save your adjustments.
Adjustments Geometry - 9 Saving Geometry Settings for Multiple Resolutions Important: In order to save a set of adjustments in the for a specific resolution, click the “Save” button. To adjust another resolution, select a different resolution from the Resolution menu. Make the adjustments, click the “Save” button and repeat the sequence for the next resolution.
Adjustments Video - 1 0 Video Use the Display Adjustment Utility to perform the Cutoff and White Balance adjustments. Perform the cutoff and white balance adjustments whenever you replace the CRT or the analog /video board.
Adjustments Cutoff - 1 1 Cutoff Perform the cutoff adjustment prior to adjusting the white balance. Make sure the monitor has been on for at least 10 minutes. 1. Using the Monitors Control Panel, set the contrast to maximum and brightness to midrange.
Adjustments Cutoff - 1 2 2. Open the Display Adjustment Utility, and select the 640 x 480 resolution from the Resolution Menu.
Adjustments Cutoff - 1 3 3. Select the Color tab window and move the Sub Contrast and Sub Brightness controls to midrange.
Adjustments Cutoff - 1 4 4. Set the drive and cutoff controls to their midpoint positions. Note: You will need to switch back and forth between the Gray Bars test pattern (under the Pattern menu) and the Color adjustment window.
Adjustments Cutoff - 1 5 5. Select the Gray Bars test pattern from the Pattern menu. Note: This procedure should be performed in a dimly lit room. Important: If any color adjustments are turned down too far, and the screen goes completely dark, press the Command-R keystroke combination to revert the color adjustment to the last saved setting.
Adjustments Cutoff - 1 6 6. Look at the Gray Bar Test pattern. • The bars should have no predominant color. • The leftmost bar should be as black as the screen border. • The second bar (from the left) should be barely visible. • The third bar should be dark gray.
Adjustments Cutoff - 1 7 7. Adjust the red, green, and blue cutoff controls until the second bar (from the left) is barely visible.
Adjustments Cutoff - 1 8 8. Check the Gray Bar test pattern. If there is a predominant color in the three gray bars (on the left), adjust the color accordingly until there is no predominant color.
Adjustments Cutoff - 1 9 9. The cutoff is now set correctly. You should see shades of black and gray and the second bar (from the left) is barely visible. 10. Click the Save button in the Color window to save your settings. 11. Proceed to the White Balance adjustment.
Adjustments Cutoff - 2 0 White Balance Make sure the cutoff is set correctly before you proceed and that the monitor has been on for at least 10 minutes. 1. Open the Display Adjustment Utility and select the Gray Bars test pattern from the Pattern menu.
Adjustments Cutoff - 2 1 2. Hold a light meter on the white bar (last bar on the right). Adjust the red, green, and blue drive controls until the light meter reads one of the following: • 18 foot candles on light meter R77. • 18 foot candles on light meter L246. • Middle of 9 on the 1 through 10 scale of light meter Model L248. Note: The drive controls adjust the lighter bars.
Adjustments Cutoff - 2 2 Important: If a predominant color is displayed in the three left gray bars, adjust the cutoff controls until you see no predominant color. Recheck the white bar until you get one of the meter readings mentioned on the previous page. Adjust the red, green, and blue drive controls until there is no predominant color and the meter reading is within the specified range.
Adjustments Cutoff - 2 3 3. Select White from the Pattern menu. 4. Hold a light meter or photometer against the center of the screen. The screen luminance reading should be one of the following: • 21 (foot candles) on light meter Model R77 • Upper end of 10 on the 10 through 18 scale of light meter Model L248. • 21 (foot candles) on the red scale of light meter Model 246.
Adjustments Cutoff - 2 4 5. Adjust the Sub Contrast slider to increase the screen brightness until the luminance measures correctly. Important: The Display Adjustment Utility requires that your system be restarted in order for Color, Sub Contrast, or Sub Brightness changes to take effect. 6. Click the Save button in the Color window to save your settings.
Adjustments Focus - 2 5 Focus Focus ± Warning: This product contains high voltage and a high-vacuum picture tube. To prevent serious injury, review the Saftey information on Service Source.
Adjustments Focus - 2 6 1. Power on the computer. 2. Open the Display Adjustment Utility and select Focus from the Pattern menu to display the focus test pattern.
Adjustments Cutoff - 2 7 Focus 3. Using a flat-head plastic adjustment tool, adjust the focus control on the flyback transformer until the focus test pattern reaches the best center-of-screen performance. 4. Replace the covers and panels and return the computer to the customer.
K Service Source Exploded View iMac
Exploded View 1 iMac Exploded View Top Rear Housing 922-3561 Top CRT Frame 922-3610 RGB/Video Cable 922-3622 922-3842, Rev 2 Outer Front Microphone Power Bezel Supply 922-3579 922-3563 Microphone Rubber Housing Cable 922-3679 922-3625 CRT Northern Hemisphere 922-3607 922-3840, Rev 2 Inner Front Screw Covers 076-0754 Bezel CRT EMI Shield Analog/Video Board 661-2080 661-2166 Rev 2 DeGauss Coil Cable Analog to PS,P505 to P908 922-3882 922-3615 Microphone Gasket 922-3679 Lower Front Panel 922-3564 Pow
Exploded View 3 Logic Board/Mass Storage Chassis Exploded View CD/Hard Drive Data Cable 922-3594 CD-ROM Drive 661-2076 Note: the bezel is a separate part Heatsink Kit 076-0752 SDRAM,SO-DIMM 661-2079, 32 MB 661-2195, 64MB Hard Drive Power Cable 922-3593 Bezel, CD (refer to Colored Service Parts Matrix Exploded View) CPU Shield Kit 076-0753 SDRAM, 4MB 661-2023 CD-ROM Release Spring Attaches to Hard Drive Carrier Logic Board 661-2061 661-2113, Ver.
Exploded View 4 Colored Service Parts Matrix Outer Front Bezel 922-3563 Bondi Blue 922-3784 Grape 922-3786 Lime 922-3783 Strawberry 922-3785Tangerine 922-3774 Blueberry Lower Front Panel 922-3740 Blueberry 922-3564 Bondi Blue* 922-3788 Grape 922-3790 Lime 922-3787 Strawberry 922-3789 Tangerine *with IrDA CD Bezel 922-3605 Bondi Blue 922-3776Blueberry 922-3796 Grape 922-3798 Lime 922-3795Strawberry 922-3797Tangerine Keyboard, USB 922-3559 Bondi Blue 922-3728 Blueberry 922-3800 Grape 922-3802 Lime 922-3799
Exploded View 5 iMac Screw Matrix Imac Screw Matrix Can Assy to CRT Chassis w/lock washer (2) Lower Access Cover (1) 0 1 8 1 3 1 5 3 4 8 2 8 4 1 0 1 8 Scale 1 8 1 1 3 1 5 3 4 8 2 8 4 1 0 1 8 1 3 1 5 3 4 8 2 8 4 1 Bottom Housing (Brass colored) (4) Bottom Housing (4) Front outer Bezel (2) Top Rear Housing (2) Bottom Housing (4) 1 3 1 5 3 4 8 2 8 4 Scale 1 1 3 1 5 3 4 8 2 8 4 1 0 1 8 1 3 1 5 3 4 8 2 8 4 1 0 0 1 8 1 3 1 5 3 4 8 2 8 4 Scale 0 1 8 1 3 1 5 3 4 8 2 8 4 1 0 1 8
Exploded View 6 Wiring Diagram, Analog/Video 661-2080 and Power Supply 661-2081 Use this wiring diagram to verify cable connections and to identify visible differences from the Ver. 2 analog/video and power supply boards. The Ver. 2 wiring diagram is shown on the next page.
Exploded View 7 Wiring Diagram, Ver. 2 Analog/Video 661-2166 and Ver. 2 Power Supply 661-2167 Use this wiring diagram to verify cable connections and to identify visible differences from the original analog/video and power supply boards. The wiring diagram on the previous page shows the cable connections of the original analog/video and power supply boards.
K Service Source Additional Procedures iMac
Additional Procedures - 1 Resetting the CD-ROM Eject Mechanism After manually ejecting CDs from the iMac CD-ROM tray (of both /A and /B models), the eject mechanism sometimes does not reset into a position that allows the tray door to close properly. Instead of replacing the CD-ROM assembly, the eject mechanism can be manually reset with a paperclip to correct the problem.
Additional Procedures - 2 1. Position the iMac on its side. 2. Insert a paperclip into the manual eject hole on the front of the CD-ROM tray door to open the tray. Note: The manual eject mechanism is accessed from the underside of the CD-ROM drive.
Additional Procedures - 3 3. Hold the bezel of the CDROM. With a paperclip, move the eject mechanism toward the CD bezel as shown. Push the eject mechanism forward until you hear a click. 4. Close the CD-ROM tray. If the tray doesn’t latch, check that the eject mechanism is clear and free of plastic parts. If it still doesn’t latch, the CD-ROM drive should be replaced.
Emergency Handbook Includes troubleshooting, hard disk repair, and software installation information for your iMac
K Apple Computer, Inc. © 1998 Apple Computer, Inc. All rights reserved. Under the copyright laws, this manual may not be copied, in whole or in part, without the written consent of Apple. Your rights to the software are governed by the accompanying software license agreement. The Apple logo is a trademark of Apple Computer, Inc., registered in the U.S. and other countries.
Contents 1 Problems Starting Up Problems 7 7 Computer won’t start up, restart, or shut down 7 Single icon appears in middle of screen 8 Computer beeps 8 Computer freezes 8 Message appears 9 Normal desktop doesn’t appear 10 Hard disk icon doesn’t appear on desktop 10 Computer starts up from wrong disk 11 Solutions 11 Take notes. 11 Wake up your computer. 11 Restart the computer. 12 Force your computer to restart. 12 Shut down the computer. 12 Force your computer to shut down. 13 Quit open applications.
Re-bless the System Folder. 16 Make sure you’re using the correct disk as a startup disk. 16 CD disc is jammed. 17 Resolve system extension conflicts. 17 Reset the PRAM. 19 Make sure memory is installed correctly. 20 Replace the computer’s backup battery. 20 Test and repair the hard disk directory. 21 Reinstall system software.
Testing Your Hard Disk for Physical Damage 50 5 Reinstalling Your Computer’s Software 53 Reinstalling System Software 53 Before Installing System Software 53 Reinstalling Mac OS System Software 54 Selecting Which Software to Install 55 Performing a Clean Installation 58 Reinstalling Your Custom Extensions, Fonts, and Control Panels 59 If the Clean Installation Didn’t Solve the Problem 60 Problems During Installation 60 Responding to Messages About Your Hard Disk 62 Reinstalling Individual Applications 62
C H A P T E R 1 1 Problems Starting Up Problems Computer won’t start up, restart, or shut down Computer won’t start up. Try these solutions: m Make sure your computer is getting power. (p. 13) m Force your computer to restart. (p. 12) m Increase the memory available for system software. (p. 15) m Make sure memory is installed correctly. (p. 20) m Replace the computer’s backup battery. (p. 20) Unusual sound occurs when you try to start up the computer.
Computer won’t shut down. Try this solution: m Force your computer to shut down. (p. 13) Single icon appears in middle of screen Icon with blinking question mark appears. Try these solutions: m Make sure external devices are properly connected and turned on. (p. 14) m Re-bless the System Folder. (p. 16) m Resolve system extension conflicts. (p. 17) m Reset the PRAM. (p. 19) m Test and repair the hard disk directory. (p. 21) m Reinstall system software. (p. 21) Icon with X appears.
m Reinstall system software. (p. 21) Computer freezes during startup or while you’re using your computer. Try these solutions: m Take notes. (p. 11) m Make sure external devices are properly connected and turned on. (p. 14) m Force your computer to restart. (p. 12) m Resolve system extension conflicts. (p. 17) m Test and repair the hard disk directory. (p. 21) m Reinstall system software. (p. 21) Keyboard or mouse doesn’t work.
Disk corruption message appears on startup. Try these solutions: m Take notes. (p. 11) m Check RAM disk settings in the Memory control panel. (p. 15) Normal desktop doesn’t appear Screen is dark. Try these solutions: m Wake up your computer. (p. 11) m Make sure your computer is getting power. (p. 13) m Reset the PRAM. (p. 19) No icons appear in windows, and pointer alternates between an arrow and a wristwatch. Try this solution: m Reset the window display. (p. 16) Empty flashing box appears.
Computer starts up from wrong disk Try these solutions: m Make sure external devices are properly connected and turned on. (p. 14) m Make sure you’re using the correct disk as a startup disk. (p. 16) m Reset the PRAM. (p. 19) m Test and repair the hard disk directory. (p. 21) Solutions Take notes. If you see an error message or the screen freezes, you don’t have to take action immediately.
Restart the computer. Often you can eliminate a problem simply by restarting your computer, which clears the computer’s memory. Always try restarting the proper way: 1 If you can, save any open documents before restarting. 2 Open the Special menu and choose Restart. Note: You can also press the power button (®) on your Apple USB keyboard or on the front of the computer. A dialog box appears. 3 Click Restart. If the computer freezes: Try quitting open applications. See “Quit open applications.
If the computer freezes: Try quitting open applications. See the following section, “Quit Open Applications.” Force your computer to shut down. If you are unable to shut down your computer the normal way, unplug your computer. Wait at least 30 seconds before turning your computer back on again. Quit open applications. When you restart your computer, the computer tries to quit all open applications. Sometimes an application doesn’t get the message to quit and you have to quit the application yourself.
Make sure external devices are properly connected and turned on. m Make sure connectors are plugged in all the way. Try unplugging connectors on all of the devices, then plugging them back in. m If the device has a power cord, make sure the cord is plugged into a working electrical outlet. m Make sure the device is turned on. m If you are connected to an Ethernet network: m Check the settings in the AppleTalk control panel to make sure that Ethernet is selected.
m If that doesn’t solve your problem, shut down your computer again. Turn off and disconnect all external equipment, except your keyboard and mouse. Then restart the computer. To determine which piece of equipment may be causing the problem, reconnect one device, start up your computer, and make sure the device is operating correctly. Then shut down the computer.
If none of these suggestions work, install additional memory, or RAM, in your computer. See the online documentation that came with your computer for instructions on how to do this. If this doesn’t solve your problem, return to “Problems” on page 7. Reset the window display. There may be a problem with the display of the windows. Restart the computer and hold down the Option key until the desktop icons appear. When the desktop appears, all windows will be closed.
m If your computer is trying to start up from a CD that is not a startup CD (it has no system software on it), press the Open button on your CD-ROM drive, carefully pull out the tray, and remove the disc. Gently push the tray in and restart your computer. Note: If your computer started up from a CD, the disc will not be automatically ejected when you shut down. Restart the computer while pressing the Open button on the drive. The tray should open so you can remove the disc.
3 Notice the name of the currently selected set of extensions in the Selected Set pop-up menu so that you can return to it later if you want. 4 Open the Selected Set pop-up menu and choose the “Mac OS 8.1 base” set. This makes the computer start up using only the software installed at the factory. 5 Click the Continue button to continue startup. 6 When the computer is ready, try the same actions that caused the problem.
Reset the PRAM. Your computer stores information in an area of memory called parameter RAM (PRAM). Resetting the PRAM replaces the information stored there with the default (original) settings. Some system preferences are stored in PRAM. Third-party software programs may also store information in PRAM. When you reset the PRAM, some of these preferences are lost. Make sure you make a note of the settings before you reset PRAM.
Make sure memory is installed correctly. If you hear one or more beeps, there may be a problem with the memory in your computer. If you recently installed RAM in your computer, check the installation instructions in the online documentation that came with your computer to make sure it is properly installed. Make sure you’ve used the proper type of RAM for your computer. If this doesn’t solve your problem, return to “Problems” on page 7. Replace the computer’s backup battery.
Test and repair the hard disk directory. Follow the instructions in Chapter 4, “Testing and Repairing Your Hard Disk Directory.” If this doesn’t solve your problem, return to “Problems” on page 7. Reinstall system software. Follow the instructions in Chapter 5, “Reinstalling Your Computer’s Software.” If this doesn’t solve your problem, return to “Problems” on page 7.
Where to Find Onscreen Help Mac OS Help Step-by-step instructions for using the Mac OS are available from Mac OS Help. To open the help system, choose Help from the Finder’s Help menu. Mac OS Info Center The Mac OS Info Center contains information about your computer and the Mac OS, including troubleshooting information. Double-click the Mac OS Info Center icon on the desktop to open the Info Center. Click this button to see the online user’s manual.
C H A P T E R 2 2 Problems Using Your Computer Problems With Applications, Documents, and Memory Message appears saying there’s not enough memory. All the memory in your Macintosh is in use by other application programs, system software, and system resources. m Quit other open programs to free memory, then open the program you want to use. Note: Make sure you have quit other applications, not just closed their open documents.
3 If the number in the Minimum Size box is larger than the largest unused block, not m m m m enough memory is available to use this program. To free memory, quit open programs or restart the computer. You can also type a smaller number in the Minimum Size box if you want to open the program using less memory. But some programs don’t work well if you assign them less memory.
Software quits unexpectedly. The application program needs more memory, or there is a software problem. m Write down what you were doing when the message appeared, and write down the text of the message. This information may help a technical support representative diagnose your problem if you later need to contact Apple or the manufacturer of the application program. About the codes in error messages: The number codes in error messages are used in software development.
Also, try reinstalling the program from the original disks. If reinstalling doesn’t solve the problem, contact the manufacturer of the program to see if the program contains software errors or “bugs” and if it is compatible with the version of system software you’re using. m Sometimes incompatible system extensions or control panels can cause system software problems. Restart while holding down the Shift key; this temporarily turns off all system extensions.
Application won’t open because a file can’t be found. Macintosh programs designed specifically for the PowerPC microprocessor (also called “native” applications) use special files called “shared libraries.” Any necessary shared libraries should be installed automatically when you install these special Macintosh programs. Follow the directions that came with your program to reinstall it. If the shared library is still missing, contact the software program’s manufacturer for assistance.
If the files are there and you still get the message, it means that you don’t have enough memory to run the application. You may be able to open the application if you try one or more of the following: m Quit other open applications. m Reduce the amount of memory allocated to the application: 1 Select the application’s icon in the Finder. 2 Choose Get Info from the File menu. 3 Type a lower number in the box for Preferred Size. m Install more memory (RAM).
Older Macintosh programs don’t work properly. m Some older Macintosh programs are not completely compatible with Macintosh computers that have the PowerPC microprocessor or Mac OS 8.1. Contact the program’s publisher to see if an upgrade is available. Window disappears. m Another window may be covering the one you’re looking for. Move, resize, close, or hide windows until you see the one you want. m The program the window is associated with may be hidden.
Can’t mount Mac OS, DOS, or ProDOS partitions. m Use PC Exchange to mount these partitions as individual volumes on the desktop. (PC Exchange is a control panel that is part of system software.) Note: If the disk contains both Mac OS and DOS-format partitions, PC Exchange will recognize only the Mac OS partition. Can’t resize Mac OS, DOS, or ProDOS partitions.
m Try starting up your computer from the system software CD that came with your computer. Insert the CD and restart while holding down the C key. (See Chapter 3, “Starting Up From a CD,” on page 45.) If only the hard disk icon appears on the desktop, then there may be a hardware problem with your CD-ROM drive. If the CD-ROM disc icon appears above the hard disk icon, reinstall your CD-ROM software. The easiest way to do this is by reinstalling your system software.
Can’t eject disc. m If file sharing is on and you are having trouble ejecting a disc, turn file sharing off in the File Sharing control panel in the Control Panels folder, available in the Apple (K) menu. “This is not a Macintosh disk: Do you want to initialize it?” message appears. m Make sure that the Foreign File Access extension is installed and turned on. Use the Extensions Manager control panel in the Control Panels folder in the Apple (K) menu to turn it on, then restart your computer.
m Make sure that the Foreign File Access, ISO 9660 File Access, and High Sierra File Access files are present in the Extensions folder in the System Folder on your hard disk. If these files are not present, reinstall your CD-ROM software. The easiest way to do this is by reinstalling your system software. See Chapter 5, “Reinstalling Your Computer’s Software,” on page 53. Problems Using Photo CDs Icon doesn’t appear on desktop. m Reinstall the CD-ROM and QuickTime software.
m If the device is connected to a USB hub, do the following: m If the hub has a power cord, make sure the cord is plugged into a working electrical outlet. m Try unplugging one or more devices from the hub. Message appears saying a device may not provide all of its functions because it requires more power. m If the device has a power cord, make sure the cord is plugged into a working electrical outlet.
m If you suspect a keyboard problem, borrow an Apple USB keyboard from another computer and connect it to yours. If that solves the problem, you may need to repair your keyboard. Consult an Apple-authorized service provider. m Make sure the cables on your device are not damaged or frayed. If so, contact the manufacturer of the device or see the documentation that came with the device.
m The printer may be out of paper or may need attention. Check the printer status lights and any messages on your screen. m Open the desktop printer icon and check for status messages. m Print a detailed report. (In the Print dialog box, select “Print detailed report” under Error Handling.) m Reinstall your printer software. m Check the settings in the application’s Page Setup dialog box. If there is a setting for “printer type,” make sure it is set to the type of printer you are using.
m Open the Memory control panel in the Control Panels folder in the Apple (K) menu; then make these changes: m In the Disk Cache section, increase the Cache Size slightly. (Because the amount of memory available for opening programs decreases as you increase the size of the cache, do not set the Cache Size too high.) m In the Virtual Memory section, click Off if you haven’t already done so.
m ATI Video Memory Manager Note: If these files are missing, you need to reinstall system software in order to have them on your computer. m Turn off virtual memory. (Apple recommends turning off virtual memory whenever you use 3D applications.) Open the Memory control panel, click the Off button in the Virtual Memory section of the control panel, and restart your computer. Right-angle bracket prompt (>) appears.
m If the sounds are regular or melodic, they may be caused by interference from electrical equipment. Move the computer farther away from any such equipment. m If you hear one or more beeps, there may be a problem with the memory in your computer. If you recently installed RAM in your computer, check the installation instructions in the online documentation that came with your computer to make sure it is properly installed. Make sure you’ve used the proper type of RAM for your computer.
m Make sure you have the access privileges you need to view the files. Ask the network administrator or the owner of the shared item to give you access. See the information on file sharing in Mac OS Help (choose Help from the Finder’s Help menu). File sharing can’t be turned on. m Make sure AppleTalk is turned on in the Chooser. m Make sure you have at least 400K of space available on your hard disk. m Some disk-formatting programs don’t work with file sharing.
Your computer can’t connect to devices outside its local network. m Check that your router address is correct in the TCP/IP control panel. Your computer can connect to hosts by IP address, but not by name. m Check the settings in the TCP/IP control panel: m Check that you have entered valid domain names in the Additional Search Domains box. m If you have entered your local and administrative domain names, double-check to make sure they’re correct.
Audio stops playing when you double-click a CD-ROM disc icon. m You can’t open data files on a CD-ROM disc and listen to audio tracks on it at the same time. Audio CD begins playing automatically when inserted. m Your computer is set to automatically begin playing audio CDs when they are inserted. To turn off this feature, use the QuickTime Settings control panel to change the automatic play setting. Sound comes out of computer’s speakers even though headphones are plugged in.
If the files are there and you still get the message, it means that you don’t have enough memory to run the application. You may be able to open the application if you try one or more of the following: m Quit other open applications. m Reduce the amount of memory allocated to the application. Follow these steps: 1 Select the application’s icon in the Finder. 2 Choose Get Info from the File menu. 3 Type a lower number in the box for Preferred Size. m Install more memory (RAM).
C H A P T E R 3 3 Starting Up From a CD To test, repair, or initialize a hard disk, or to install or remove system software on a hard disk, you need to start up your computer from another disk. You can start up your computer using the software install CD-ROM disc. Starting Up From the Software Install CD Follow these steps to start up from the software install CD. 1 Turn on your computer if it’s not already running. 2 Press the Open button on your CD-ROM drive.
When You’re Done With the CD When you start up your computer from a CD, the CD cannot be ejected in the usual way. To restart your computer from the hard disk and eject the CD: 46 Chapter 3 1 Choose Restart from the Special menu. 2 Immediately after hearing the startup sound, press the eject button on the front of the CD-ROM drive. Note: You can also change the startup disk by opening the Startup Disk control panel and selecting the hard disk. Restart your computer.
C H A P T E R 4 4 Testing and Repairing Your Hard Disk Directory If you see a message reporting that a disk is “damaged” or unreadable, the directory on your hard disk may have become corrupted. The directory can be corrupted m any time the computer is not shut down properly, using the Shut Down command m when your computer freezes or crashes Repairing Corrupted Data on Your Disk Most data corruption can be fixed easily by using Disk First Aid.
Disk icons appear in a box at the top of the Disk First Aid window. 4 Click Repair to begin testing and repairing the disk directory. If Disk First Aid Cannot Correct the Problem m Make sure you started up from the software install CD. See Chapter 3, “Starting Up From a CD,” on page 45. m Try running Disk First Aid a second or third time. Sometimes repeating the process corrects the problem. m Use the Drive Setup utility (typically located in the Utilities folder) to update the driver.
Updating the Hard Disk Drivers 1 Start up your computer from the software install CD. (See Chapter 3, “Starting Up From a CD,” on page 45.) 2 Locate the Drive Setup icon and double-click it to open the Drive Setup program. 3 In the list of drives, click the disk you want to update. 4 From the Functions menu, choose Update Driver. A message appears saying the new driver won’t be available until you restart your computer. 5 Restart your computer. (See “Restart the computer.” on page 12.
1 Start up your computer from the software install CD. (See Chapter 3, “Starting Up From a CD,” on page 45.) 2 Locate the Drive Setup icon and double-click it to open the Drive Setup program. 3 In the list of drives, select the disk you want to initialize. 4 Click Initialize. If initialization fails, choose Initialization Options from the Functions menu to select the “Low level format” and “Zero all data” options. Then try initializing the disk again.
2 Locate the Drive Setup icon and double-click it to open the Drive Setup program. 3 In the list of drives, click the disk you want to test. 4 From the Functions menu, choose Test Disk. 5 When a message tells you that the testing is complete, click Quit. If the test reveals a problem, the hard disk may be damaged. Consult an Apple-authorized service provider for assistance.
C H A P T E R 5 5 Reinstalling Your Computer’s Software If you are having problems with the system software or applications that came with your computer, you can replace software in the following ways: m reinstall system software—if you encounter system software problems or you want to add or remove system software components m reinstall individual applications—if you inadvertently erased an application on your hard disk, are having problems with an application, or an application is damaged m restore your
m Software that runs in the background: If you are using software that runs in the background, such as virus protection software or access control software, you may need to turn it off before you reinstall system software. For instructions, see the documentation that came with the software. It is highly recommended that you back up the data on your hard disk before installing system software.
The Select Destination dialog box appears. If necessary, use the pop-up menu to choose another destination disk. If you want to perform a clean installation, skip to “Performing a Clean Installation” on page 58. Otherwise, continue with the following step. Note: A clean installation gives you a fresh start with system software. It is sometimes the best way to solve a persistent problem. 4 Choose the destination disk from the pop-up menu and click Select. The following dialog box appears.
Custom installation: Click Add/Remove. Proceed to “Custom Installation” on page 56. Standard Installation 1 Follow the instructions on your screen until you see the Install Software window. Note: Your screen may look slightly different from the one pictured here. 2 If you want to update the hard disk drivers and create an installation report, click Options. In the window that appears, click the appropriate checkboxes, then click OK. 3 Click Start.
2 Open the pop-up menu next to each software product and choose an option. m Customized Installation—lets you choose the components to install m Customized Removal—lets you choose the components to remove Note: Recommended Installation installs the standard components. 3 All available components for the software product appear in a window. To select all components or none, open this pop-up menu and select the appropriate option. Select the components you want to install or remove.
Performing a Clean Installation This section provides instructions for what is commonly called a “clean installation” of system software. Performing a clean installation is more complicated than a standard installation, but it is sometimes the best way to solve a persistent problem. A clean installation gives you a fresh start with system software. When you install system software using a clean installation, the Installer creates a new System Folder on your hard disk.
4 Click Options. 5 Click the Perform Clean Installation checkbox so that it has a checkmark in it, then click OK. 6 Click Select and follow the instructions until you see the Install Software dialog box. 7 To install software other than the basic system, click Customize and follow the instructions in the section, “Custom Installation” on page 56. 8 Click Start to install the software. A new System Folder is installed on your hard disk. (The old System Folder is renamed Previous System Folder.
If the Clean Installation Didn’t Solve the Problem You may have a hardware problem. Consult an Apple-authorized service provider. You may want to revert to the Previous System Folder so that you do not have to reinstall your custom extensions, fonts, control panels, and other items not installed with Mac OS 8.1. To use the previous system again, follow the steps in this section. Reverting to the previous System Folder may not work. If it doesn’t, you’ll have to perform a clean installation again.
The files on your hard disk disappear when you start up from the CD. m If no files appear on the hard disk except for a single document called “Where have all my files gone?”, you started up your computer from a CD with system software earlier than Mac OS 8.1. To see the contents of your disk, you must start up your computer from a disc with Mac OS 8.1 (or later). You can’t install or restore software. m Make sure your computer started up from the software install CD.
m The System and Finder files may be locked. To see if your System file or Finder file is locked, open the System Folder and select the System or Finder icon. Open the File menu and choose Get Info. To unlock the file, click the Locked checkbox to remove the checkmark. m Try performing a clean installation of system software. See “Performing a Clean Installation” on page 58. You see a message that the installation was not successful.
Restoring All Original Software The Apple Software Restore application, located on the software restore CD, restores all your original software, including original system software, factory settings, and applications that came with your computer. This application gives you the option of erasing your hard disk before restoring the original software, or just replacing the original software (“Restore In Place”).
7 Click Quit when the process is complete. Erasing Your Hard Disk This procedure completely erases the contents of your hard disk before restoring the original contents (original system software, factory settings, and applications that came with your computer). 1 Start up your computer from the software restore CD and open the Apple Software Restore application. For instructions, see Chapter 3, “Starting Up From a CD,” on page 45. 2 Click the OK button on the introductory screen.
C H A P T E R 6 6 Contacting Apple for Help If this handbook has not helped you solve your computer’s problem, try getting information from Apple’s product support site on the World Wide Web. See the next section, “Obtaining Information via the World Wide Web.” If you can’t find answers on the support Web site, or don’t have access to the Web, contact Apple for assistance. For information on how to contact the Apple Assistance Center, see the service and support card that came with your computer.
Have This Information Available Before Calling Have the following information and software available when calling the Apple Assistance Center: m a description of the problem (for example, the computer freezes in only one application or at startup) m what you have tried to do already m the type of computer m the serial number of your computer m the version of system software, third-party software, external devices, and so on (especially if the problem involves something you have added to the computer) m the
Index Can’t find it? See also Mac OS Help’s onscreen index. Open the Help menu and choose Help; then click the Index button. A C Administration password, forgetting 40 Apple Assistance Center 65, 66 AppleCD Audio Player 31, 41 Apple Guide.
Can’t find it? See also Mac OS Help’s onscreen index. Open the Help menu and choose Help; then click the Index button. disks. See CD-ROM discs; hard disk documents.
Launcher 29 locked files 28, 62 Mac OS partitions 30 Mac OS system software.
P Can’t find it? See also Mac OS Help’s onscreen index. Open the Help menu and choose Help; then click the Index button. parameter RAM.
system software memory problems 9, 15–16 message about 9 not recognized by computer 16 reinstalling 53–64 removing 57 updates for 65 System suitcase file, damaged 48 T TCP/IP control panel 40, 41 Tech Exchange 65 Tech Info Library 65 testing extensions and control panels 18 testing hard disk 50–51 3D accelerator 37–38 3D Surround Sound 42 troubleshooting.
