'HOO 2SWL3OH[ *;SUR 6\VWHPV 86% (QKDQFHG DQG ,QWHJUDWHG 0ESV (WKHUQHW 6(59,&( 0$18$/ ®
Information in this document is subject to change without notice. 1996 Dell Computer Corporation. All rights reserved. Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden.
Contents Chapter 1 System Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 System Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Dual-Processor Capability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Advanced Expansion Subsystem . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5 Hard-Disk Drive Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 2 Basic Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1 Initial User Contact . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . External Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Observing the Boot Routine . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Internal Visual Inspection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminator Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-23 Add-In Card . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-24 System Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-25 System Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-26 Appendix A System Setup Program . . . . . . . . . . . . . . . . . . . . . . . . . .
Figure 4-16. Figure 4-17. Figure 4-18. Figure 4-19. Figure 4-20. Figure 4-21. Figure 4-22. Figure 4-23. Figure 4-24. Figure 4-25. Figure 4-26. Figure A-1. Expansion-Card Cage Removal . . . . . . . . . . . . . . . . . . . . . . 4-17 Expansion-Card Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-18 Riser Board Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-19 DIMM Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-20 DIMM Installation. . . . .
ix
Read This First A prerequisite for using this manual to service Dell computer systems is a basic knowledge of IBM®-compatible PCs and prior training in IBMcompatible PC troubleshooting techniques. In addition to information provided in this manual and the User’s Guide that came with the system, Dell provides the Diagnostics and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test the computer system.
Chapter 1 System Overview This service manual covers the Dell ® OptiPlex ® GXpro high-speed, upgradable desktop systems, which use the Intel® Pentium® Pro family of microprocessors. These Dell systems incorporate the high-performance PCI local bus as well as the ISA expansion bus. These buses are built into the system board, which also integrates a 3.3-V Pentium Pro microprocessor and all other elements of the basic computer system.
System Features In addition to the standard features found in a traditional personal computer, the Dell OptiPlex GXpro desktop systems include the following new and/or advanced features: • • • • • • • • Dual-processor capability. Advanced combination ISA and PCI expansion subsystem. Plug and Play capability. Enhanced dual-interface EIDE subsystem. 16-bit integrated audio controller. PCI video card. Integrated 10-Mbps or 10/100-Mbps Ethernet NIC.
back of system unit left side right side front of system unit Figure 1-1. System Unit Orientation CAUTION: To avoid possible data or file structure corruptions, the front-panel reset button should be used only when the system cannot be rebooted by pressing . Before you use the reset button to initiate a hardware reset, close any open application programs and files if possible.
power button power indicator reset button hard-disk drive access indicator Figure 1-2. Front-Panel Features 3.
Dual-Processor Capability With the installation of a microprocessor add-in card in the terminator card slot, the system unit becomes a dual-processing system. The add-in card’s microprocessor must have the same frequency and cache size as the system board’s microprocessor. In order to take advantage of two processors, dual-processing systems must have multiprocessing operating systems, such as the Microsoft® Windows NT ® 3.5x, Windows NT 4.
Hard-Disk Drive Options The hard-disk drive bracket is located next to the drive bays at the front of the system unit. The system unit can contain up to two, one-inch-high, hard-disk drives or one, 1.6-inch-high, half-height and one, one-inch-high, hard-disk drive. Enhanced Dual-Interface EIDE Subsystem The enhanced dual-interface EIDE subsystem supports two EIDE interfaces (primary and secondary), each of which can support up to two EIDE devices.
NIC GXpro systems contain either an integrated 10-Mbps or 10/100-Mbps 3Com NIC. GXpro systems containing the 10-Mbps Ethernet NIC have a built-in integrated 3Com 3C915 NIC chip. GXpro systems containing the 10/100-Mbps Ethernet NIC have a built-in integrated 3Com 3C916 Ethernet NIC chip. The NIC subsystem connects to the Ethernet network through a single RJ45 connector on the back panel of the computer.
SMART Support The system has SMART-compliant hard-disk drives and SMART support in the system BIOS, which warns you at system start-up if a hard-disk drive has become unreliable. System Unit The following subsections provide service-related information about the system unit. System Power Supply The 230-W system power supply can operate from an AC power source of 115 VAC at 60 Hz or 230 VAC at 50 Hz. The system power supply provides the DC operating voltages and currents listed in Table 1-1.
–5 VDC (white) +5 VDC (red) common (black) +5 VDC (red) common (black) +5 VDC (red) TFSC 2 (brown) common (black) PSON# 1 (gray) +5 VDC (red) 11 12 13 14 15 16 17 18 19 20 1 8 P1 2 3 4 5 6 7 9 10 +5 VDC (red) common (black) common (black) common (black) +5 VDC (red) –12 VDC (blue) +12 VDC (yellow) common (black) +5 VFP (purple) PWRGOOD 3 (orange) 1 Pin 11 — PSON# should measure between +4 and +5 VDC except when the power button on the front panel is pressed, taking PSON# to its
P7 1 2 3 4 5 6 +3.3 VDC (blue/white) +3.3 VDC (blue/white) +3.3 VDC (blue/white) common (black) common (black) common (black) Figure 1-7. DC Power Connector P7 DC Power Distribution Figures 1-8 and 1-9 provide the following information about DC power distribution: • Power-supply connector identification • Power cable connections for diskette, tape, CD-ROM, and hard-disk drives • Power distribution to sockets and connectors on the system board P1 P4 P6 P7 P5 P3 P2 Figure 1-8.
system board keyboard controller +3 VDC riser board battery power management logic P1 PWRGOOD system power supply PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC RTC/ NVRAM +5 VDC +12 VDC –12 VDC POWER1 RISER PSON# +5 VFP +5 VDC –5 VDC +12 VDC –12 VDC +5 VDC –5 VDC +12 VDC –12 VDC +5 VDC –5 VDC +12 VDC –12 VDC PCI1 through PCI5 ISA1, ISA2 P7 +3.3 VDC POWER2 optional drive optional drive P2 DIMM_A P3 FUSE 3.
System Board Layout The subsections that follow provide service-related information about the system board components.
Main Memory The four DIMM sockets on the system board can accommodate combinations of 16-, 32-, 64-, and 128-MB DIMMs up to a total memory capacity of 512 MB. The system is shipped with high-speed (60-ns) EDO DIMMs that provide ECC functionality when used with the Intel 82440FX PCIset. EDO parity mode DIMMs can be mixed, as follows: • Any socket can be populated or not. There is no requirement that one socket be filled before the other, and empty sockets can be left between installed DIMMs.
Table 1-2. Jumper Descriptions Default Setting Jumper Description PSWD Password enable/disable. Jumper installed, activates password feature. Installed (password feature enabled) BIOS Used for internal Dell debug tool. Not installed (reserved, do not change) RSRVD4 RSRVD3 RSRVD2 RSRVD1 Reserved. Not installed (reserved, do not change) 200MHZ Microprocessor speed. Installed if the microprocessor’s internal speed is 200 MHz, or else not installed 180MHZ Microprocessor speed.
Table 1-3. Interrupt Assignments (continued) IRQ Line Used By/Available IRQ8 Generated by keyboard controller for each tick of RTC. IRQ9 Available for use by expansion card. IRQ10 Available for use by expansion card. IRQ11 Available for use by expansion card. IRQ12 Generated by keyboard controller to indicate that mouse’s output buffer is full. IRQ13 Generated by math coprocessor to indicate coprocessor error.
Technical Specifications Table 1-5. Technical Specifications Microprocessor Microprocessor type . . . . . . . . Intel Pentium Pro microprocessor Microprocessor speed. . . . . . . 200 or 180 MHz First-level cache . . . . . . . . . . . 16 KB Second-level cache . . . . . . . . . 256 KB for 180 or 200 MHz; 512 KB for 200 MHz Math coprocessor . . . . . . . . . . internal to the microprocessor System Information System chip set. . . . . . . . . . . . Intel Natoma 82440FX set Data bus width . . . . . . . . . . .
Table 1-5. Technical Specifications (continued) System Clocks System clock . . . . . . . . . . . . . . 60 or 66 MHz (matches external processor speed) Diskette/communications ports . . . . . . . . . . . . . . . . . . . . 24 MHz from the system clock Memory Architecture . . . . . . . . . . . . . . 64-bit, noninterleaved DIMM sockets . . . . . . . . . . . . four DIMM capacities . . . . . . . . . . 16, 32, 64, and 128 MB, EDO ECC mode Standard RAM . . . . . . . . . . . . 16 MB Maximum RAM . . . . . . . . . .
Table 1-5. Technical Specifications (continued) Ports (continued) Internally accessible: EIDE hard-disk drive . . . . two 40-pin connectors on PCI local bus Diskette drive . . . . . . . . . . 34-pin connector Video Video type. . . . . . . . . . . . . . . . PCI video card (see manufacturer’s specifications) Key Combinations . . . . . . . . . . . . restarts (reboots) the system . . . . . . . . . . . starts System Setup program (during POST only) <\> . . . . . .
Table 1-5. Technical Specifications (continued) Physical Height . . . . . . . . . . . . . . . . . . . 16.5 cm (6.5 inches) Width. . . . . . . . . . . . . . . . . . . . 41.9 cm (16.5 inches) Depth. . . . . . . . . . . . . . . . . . . . 44.5 cm (17.5 inches) Environmental Weight . . . . . . . . . . . . . . . . . . 12.7 kg (28 lb) or more, depending on options installed Temperature: Operating . . . . . . . . . . . . . 10° to 35°C (50° to 95°F) Storage . . . . . . . . . . . . . . .
1-20 Dell OptiPlex GXpro Systems Service Manual
Chapter 2 Basic Troubleshooting T his chapter describes basic troubleshooting procedures that can help you diagnose a computer system problem. These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the system. A brief explanation of how to load and start the diskette-based diagnostics is located at the end of the chapter. Dell recommends that you perform the following procedures in the order they are presented in this manual.
External Visual Inspection The external visual inspection consists of a quick inspection of the exterior of the system unit, the monitor, the keyboard, any peripherals, and cables. While performing the visual inspection, make any necessary corrections. To perform the external visual inspection, follow these steps: 1. Turn off the system unit, the monitor, and all peripherals. 2. Verify that all power cables are properly connected to the system unit, the monitor and peripherals, and their power sources. 3.
8. Inspect the exterior of the system unit, including all controls and indicators, and all user-accessible data storage devices for any signs of physical damage. Does the inspection reveal any problems? Yes. Proceed to the appropriate procedure in Chapter 4, “Removing and Replacing Parts.” No. Proceed to the next section, “Observing the Boot Routine.
• System error messages: These messages can indicate problems or provide status information. If a system error message is displayed, see Table 3-2. • Beep codes: A beep code is a series of beeps that indicates an error condition. If the system emits a beep code, see Table 3-1. NOTE: The system beeps once during the boot routine. This single beep is normal and is not a beep code. 5. Observe the monitor screen for the Diagnostics Menu. Does the Diagnostics Menu appear? Yes.
To reseat the microprocessor, remove it from its socket and reinstall it as described in “Microprocessor/Heat Sink Assembly” in Chapter 4. To reseat a DIMM, remove it from its socket and reinstall it as described in “DIMMs” in Chapter 4. If you need to reseat an expansion card, use a 1/4-inch nut driver to remove the screw that secures the card-mounting bracket. Grasp the card by its top corners, and carefully pull it out of its connector.
To start the diagnostics, turn off the system unit, insert a diagnostics diskette into drive A, and then turn on the system unit. Starting the diagnostics causes the Dell logo screen to appear on the monitor screen, followed by a message indicating that the diagnostics is loading. Before the diagnostics loads, a program tests the portion of main memory (RAM) required for loading the diagnostics. If a RAM error is detected, a message appears on the screen telling you which DIMM has failed.
Chapter 3 Beep Codes and Error Messages T his chapter describes beep codes and system error messages that can occur during system start-up or, in the case of some failures, during normal system operation. The tables in this chapter list faults that can cause a beep code or system error message to occur and the probable causes of the fault in each case.
Table 3-1.
Table 3-1. POST Beep Codes (continued) Beep Code Error Probable Causes 4-3-3 Timer-chip counter 2 failure Defective system board 4-3-4 Time-of-day clock stopped Bad battery or defective system board 4-4-1 Serial/parallel port test failure Faulty I/O chip (defective system board) System Error Messages Table 3-2 lists (in alphabetical order) system error messages that can appear on the monitor screen. These messages can help you find the source of a problem.
Table 3-2. System Error Messages Message Definition Probable Causes Address mark not found BIOS found faulty disk sector or could not find particular disk sector. Attachment failed to respond Diskette drive or harddisk drive controller cannot send data to associated drive. Faulty diskette/tape drive subsystem or hard-disk drive subsystem (defective system board). Faulty interface cable or connector. Bad command or file name Command entered does not exist or is not in pathname specified.
Table 3-2. System Error Messages (continued) Message Definition Probable Causes Diskette subsystem reset failed System could not successfully issue reset command to diskette controller. Faulty diskette/tape drive controller (defective system board). Diskette write protected Diskette write-protect feature activated. Diskette write-protected. Drive not ready Diskette missing from or improperly inserted in diskette drive. Missing, defective, unformatted, or improperly inserted diskette.
Table 3-2. System Error Messages (continued) Message Definition Probable Causes Invalid configuration information please run SETUP program System Setup program contains incorrect system configuration settings. Incorrect configuration settings in System Setup program or faulty battery. Keyboard clock line failure System cannot communicate with keyboard. Keyboard cable connector loose or improperly connected, defective keyboard, or defective keyboard/mouse controller (defective system board).
Table 3-2. System Error Messages (continued) Message Definition Probable Causes Memory address line failure at address, read value expecting value During memory test, value read at address was incorrect. Faulty or improperly seated DIMMs or defective system board. Memory allocation error Software in use conflicts with operating system, application program, or utility. Faulty application program or utility. Memory tests terminated by keystroke Memory test did not complete.
Table 3-2. System Error Messages (continued) 3-8 Message Definition Probable Causes No boot device available System does not recognize diskette drive or hard-disk drive from which it is trying to boot. Faulty diskette, diskette/ tape drive subsystem, hard-disk drive, hard-disk drive subsystem, or no boot disk in drive A. No boot sector on hard-disk drive Configuration settings in System Setup program incorrect, or operating system corrupted.
Table 3-2. System Error Messages (continued) Message Definition Probable Causes Sector not found MS-DOS unable to locate sector on diskette or hard-disk drive. Defective sectors on diskette or hard-disk drive. Seek error MS-DOS unable to locate specific track on diskette or hard-disk drive. Defective diskette or hard-disk drive. Seek operation failed System could not find particular address mark on disk. Faulty diskette or harddisk drive. Shutdown failure System board chip faulty.
Table 3-2. System Error Messages (continued) Message Definition Probable Causes WarningTemperature is too high At system start-up, BIOS detected that one or both microprocessors have overheated. One or both microprocessors are too hot. Write fault MS-DOS cannot write to diskette or hard-disk drive. Faulty diskette or harddisk drive.
Chapter 4 Removing and Replacing Parts T his chapter provides procedures for removing the components, assemblies, and subassemblies in the system unit. Unless otherwise noted, each procedure assumes the following: • You have performed the steps in “Precautionary Measures” found later in this chapter. • You have removed the system unit cover. • You can replace or reinstall a part by performing the removal procedure in reverse order unless additional information is provided.
Precautionary Measures Before you perform any of the procedures in this chapter, take a few moments to read the following warning for your personal safety and to prevent damage to the computer system from ESD. WARNING FOR YOUR PERSONAL SAFETY AND PROTECTION OF THE EQUIPMENT: Before you start to work on the computer, perform the following steps in the sequence indicated. 1. Turn off the system unit and any attached peripherals. 2.
Floor Stand floor stand screw Figure 4-1. Floor Stand Removal To remove the floor stand, follow these steps: 1. Place left side of the system unit on a flat work surface. 2. Unscrew the floor stand screw. Use your fingers or a wide flat-blade screwdriver to unscrew the floor stand screw. The screw is captured and separated from the floor stand. 3. Pull the floor stand away from the system unit. Disengage the three orientation nubs that position and help hold the floor stand to the system unit.
System Unit Cover front of system unit securing button Figure 4-2. System-Unit Cover Removal To remove the system unit cover, follow these steps: 1. Remove the padlock if one is installed. back of system unit Figure 4-3. Padlock Removal 2. Press in the two securing buttons until the cover is free to swing up. 3. Lift the cover, from the back, pivoting it toward the front of the system unit. Four plastic hooks on the inside of the front part of the cover secure it to the chassis.
Eject, Power, and Reset Buttons system unit cover (upside down) reset button eject button power button 3.5-inch frontpanel insert Figure 4-4. Eject, Power, and Reset Button Removal To remove the eject, power, and reset buttons, follow these steps: 1. Lay the system unit cover upside down on a flat work surface, with the back of the cover facing you. 2. To remove the 3.5-inch diskette-drive eject button, pull gently on the plastic part of the button until it comes free. 3.
Front-Panel Inserts system unit cover (upside down) post (2) ring-tab (2) 5.25-inch frontpanel insert Figure 4-5. Front-Panel Insert Removal To remove a front-panel insert, follow these steps: 1. Lay the system unit cover upside down on a flat work surface, with the back of the cover facing you. 2. For a 5.25-inch bay, pull the insert from the two retaining posts until the ring-tabs are released (see Figure 4-5). For the 3.5-inch bay, locate the spring-loaded back end of the eject button mechanism.
Indicator Card chassis hook (2) indicator card screw indicator card cable speaker connector Figure 4-6. Indicator Card Removal To remove the indicator card, follow these steps: 1. Remove the hard-disk drive bracket. See “Drives” found later in this chapter. 2. Remove the speaker connector from the indicator card. 3. Disconnect the indicator cable from the system board. Slide the indicator cable through the cable slot in the bottom of the chassis. 4.
Speaker speaker connector retaining slot speaker Figure 4-7. Speaker Removal To remove the speaker, follow these steps: 1. Remove the hard-disk drive bracket. See “Drives” found later in this chapter. 2. Remove the speaker connector from the indicator card. 3. Lift the speaker out of the retaining slots on the front of the chassis.
Drives Figure 4-8 shows an example of drive hardware that can be installed in the system unit. Refer to this figure when you perform any of the procedures in the following subsections. DC power cable two-bay drive cage diskette/tape drive interface cable 3.5-inch diskette drive system power supply CD-ROM/tape drive interface cable hard-disk drive bracket power input connectors DSKT connector IDE2 connector IDE1 connector Figure 4-8.
Drives in the Drive Cage retaining screw bracket mounting screw (2) hook (2) bracket catch Figure 4-9. 3.5-Inch Diskette Drive Removal To remove a drive from the 3.5-inch diskette drive bay, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Remove the bracket retaining screw. 3. Release the bracket catch from the chassis. Rotate the drive bracket to the right, and lift the bracket from the top of the drive bay. 4.
retaining tab (2) Figure 4-10. 5.25-Inch Drive Removal To remove a 5.25-inch drive from the middle or lower drive bay, follow these steps: 1. Disconnect the DC power cable and the interface cable from the back of the drive. 2. Press out on the two retaining tabs on the sides of the drive bay, slide the drive forward, and remove it from the drive bay.
Hard-Disk Drives handle screw hook (2) hard-disk drive bracket Figure 4-11. Hard-Disk Drive Bracket Removal To remove a hard-disk drive bracket, follow these steps: 1. Disconnect the DC power cable(s) and the interface cable(s) from the back of the drive(s). 2. Remove the screw that secures the hard-disk drive bracket to the chassis. 3. Grasp the handle on the front of the bracket, and rotate the bracket back until it swings free from the chassis.
drive-bracket mounting screw (4) hard-disk drive hard-disk drive bracket Figure 4-12. Hard-Disk Drive Removal To remove a hard-disk drive, follow these steps: 1. Remove the hard-disk drive bracket from the system unit. See the preceding procedure. 2. Remove the four screws that secure the hard-disk drive(s) to the bracket. 3. Slide the drive(s) out of the hard-disk drive bracket.
System Power Supply power supply securing tab DC power cable (8) slot hook system board Figure 4-13. Power Supply Removal To remove the system power supply, follow these steps: 1. Disconnect the AC power cable from the back of the power supply. 2. Disconnect the DC power cables from the system board, drives, and expansion cards. 3. Free the system power supply from the securing tab labeled “RELEASE —>,” and rotate it to the right until it stops.
Microprocessor Fan lock microprocessor fan connector latching tab (4) power cable fan Figure 4-14. Microprocessor Fan Removal To remove the system power supply, follow these steps: 1. Rotate the power supply to the right to access the microprocessor fan connector. See “System Power Supply,” found earlier in this chapter. 2. Sqeeze the latch and pull out the fan power cable from the microprocessor fan connector located on the system board under the power supply. 3.
System Board Components The subsections that follow contain procedures for removing system board components.
Expansion Cards The system unit has a removable expansion-card cage. The expansion cards fit into connectors on a riser board. Dell recommends that you remove the expansion-card cage first before removing or installing expansion cards. Expansion-Card Cage lever expansioncard cage notch chassis Figure 4-16. Expansion-Card Cage Removal To remove an expansion-card cage, follow these steps: 1. Disconnect any cables from the expansion cards and the riser board. 2.
Expansion Card retaining screw expansion card card-mounting bracket expansion-card connector card-slot opening riser board Figure 4-17. Expansion-Card Removal To remove an expansion card, follow these steps: 1. Remove the expansion-card cage. See the preceding procedure. 2. Remove the retaining screw from the card-mounting bracket. 3. Grasp the expansion card by its corners, and carefully remove it from the expansion-card connector.
Riser Board retaining screw (2) slot (2) expansion-card cage riser board Figure 4-18. Riser Board Removal To remove the riser board, follow these steps: 1. Remove the expansion-card cage and all expansion cards. See the preceding two procedures. 2. On a flat work surface, turn the expansion-card cage over, with the riser board facing you. 3. Remove the riser-board retaining screws. 4.
DIMMs DIMM 2. securing clip (2) 1. Figure 4-19. DIMM Removal To remove a DIMM, push outward on the DIMM socket’s securing clips until the DIMM is released from its socket. Then lift the DIMM away from the socket. DIMM 2. securing clip (2) 1. Figure 4-20. DIMM Installation To replace a DIMM, press outward on the securing clips at each end of the socket until they snap open.
Microprocessor/Heat Sink Assembly heat sink microprocessor securing clip hooks over tabs on socket (front and back) microprocessor socket release lever microprocessor Figure 4-21. Microprocessor Securing Clip To remove the microprocessor/heat sink assembly, follow these steps: 1. Remove the microprocessor securing clip from the microprocessor/heat sink assembly. WARNING: The microprocessor chip can get extremely hot during system operations.
securing clip heat sink thermal interface pad microprocessor microprocessor socket pin-1 corner of socket front tab Figure 4-22. Microprocessor Removal If you are installing a new microprocessor/heat sink assembly, you need to place the thermal interface pad that comes with the replacement microprocessor between the microprocessor and the heat sink before reinstalling the securing clip.
Terminator or Add-In Card The system unit may have a terminator card or a secondary microprocessor (dual-processing systems) on an add-in card installed on the system board. This section describes removing and replacing the terminator card and the add-in card. Terminator Card handle terminator card Figure 4-23. Terminator Card Removal To remove a terminator card, follow these steps: 1. Grasp the small white “handle” installed on the top of the card.
Add-In Card mountingbracket edge card guide metal mounting bracket mounting-bracket edge tab Figure 4-24. Add-In Card Removal To remove an add-in card, follow these steps: 1. Gently grip the card’s metal mounting bracket with both hands. 2. Pull up until the card is freed from the connector. To reinstall the card, with the metal mounting bracket facing the left side of the chassis, fit the edge of the bracket into the card guide attached to the back wall of the chassis.
System Battery battery BATTERY socket Figure 4-25. System Battery Removal To remove the system battery, follow these steps: 1. If possible, enter the System Setup program, and make a printed copy of the System Setup screens. 2. Rotate the power supply out of the way. See “System Power Supply” found earlier in this chapter. 3. Remove the battery. Pry the battery out of its socket with your fingers or with a blunt, nonconducting object, such as a plastic screwdriver.
System Board screw slot (7) Figure 4-26. System Board Removal To remove the system board, follow these steps: 1. Disconnect all cables from their connectors at the back of the system unit. 2. Remove the expansion-card cage. 3. Remove the microprocessor fan. 4. Disconnect all cables from the system board. Remove the hard-disk drive power cable(s). Slide any drives in the 5.25-inch bays toward the front of the system unit, but leave them cabled. 5. Remove the system board as follows: a.
Appendix A System Setup Program T his appendix describes the System Setup program, which is used to change the system configuration information stored in NVRAM on the system board. To enter the System Setup program, follow these steps: 1. Turn on (or reboot) the system. 2. Press immediately after the monitor displays the message Press for System Setup.
System Setup Screens Dell Computer Corporation System OptiPlex GXpro 200 Setup Page 1 of 2 Time: 13:17:02 Diskette Drive A: Diskette Drive B: Drive A Location: Drives: Date: Mon Jan 6, 1997 This category sets the time in 24-hour format (hours:minutes: seconds) for the internal clock/ calendar. 3.5 inch, 1.44 MB Not Installed Top To change the value in a field, enter a number or use the leftor right-arrow key.
Table A-1. System Setup Categories Category Function Time Resets time on system’s internal clock. Date Resets date on system’s internal calendar. Diskette Drive A Diskette Drive B Identifies type of diskette drives installed. Category options always match physical locations of drives in system unit. Tape drives are not reflected in these categories. Drive A Location Identifies which diskette drive is used as the boot drive.
Table A-1. System Setup Categories (continued) Category Function Reserved Memory Designates a region of system board memory that can be supplied by an expansion card. This feature should not be enabled unless an expansion card that requires special addressing is installed. Fast Video BIOS Enables shadowing and caching the BIOS for a video card installed in an expansion slot. NOTE: Some video cards are not designed to be shadowed or cached. If video problems occur, try setting Fast Video BIOS to Off.
Table A-1. System Setup Categories (continued) Category Function Power Management With the Power Management category enabled, DPMS monitors and most EIDE drives automatically switch into low-power mode during periods of system inactivity. CAUTION: Before enabling this feature, check the monitor documentation to make sure the system has a DPMS-compliant monitor. Otherwise, there is a risk of damaging the monitor. NOTE: Not all EIDE hard-disk drives support this feature.
Table A-1. System Setup Categories (continued) Category Function Microprocessor Displays type of microprocessor installed. Level 2 Cache Displays size of level-2 cache memory in microprocessor. System Memory Displays entire amount of installed memory detected in system, except for memory on EMS expansion cards. If EDO DIMMs are installed, EDO is displayed next to this category. A-6 Service Tag Displays system’s five-character service tag number.
Index Numbers 3.
drives, 1-17, 4-9 DSKT connector, 1-12, 4-16 dual-processing, 1-5 E ECC DIMMs, 1-2 EDO DIMMs, 1-2, 1-13 H hard-disk drive access indicator, 1-4 hard-disk drives about, 1-6 bracket, 1-4, 4-12 connectors, 1-12, 4-9, 4-16 location, 1-4 removal, 4-13 help, getting, 2-6 EIDE connectors, 1-12, 4-9, 4-16 eject button removal, 4-5 I enhanced dual-interface EIDE subsystem, IDE1 connector, 1-12, 4-9, 4-16 1-6 error messages, system, list of, 3-3 ESD, 4-2 expansion cards card-slot opening, 1-4, 4-17, 4-18 conn
L Plug and Play expansion cards, 1-5 LINE-IN connector, 1-12, 4-16 line-in jack, 1-4, 1-12, 4-16 POST beep codes, 3-1 power button location, 1-4 removal, 4-5 power distribution diagram, 1-11 M power indicator, 1-4 memory, main, 1-2, 1-13 power input connectors, 1-12, 4-16 messages, error, 3-3 power supply, 1-8 cable configuration, 1-10 DC voltage ranges, 1-8 illustrated, 1-10 removal, 4-14 microphone jack, 1-4, 1-12 microprocessor release lever, 4-21 removal, 4-21 secondary, removal, 4-23 socket,
subsystems advanced expansion, 1-5 enhanced dual-interface EIDE, 1-6 main memory, 1-13 video memory, 1-12 switch, voltage selection, 1-4 system board components removal, 4-16 illustrated, 1-12 jumpers, 1-13 location inside chassis, 1-4 removing and replacing, 4-26 troubleshooting boot routine, interpreting, 2-3 external visual inspection, 2-2 initial procedures, 2-1 initial user contact, 2-1 internal visual inspection, 2-4 U system board jumpers, 1-13 USB description, 1-7 location, 1-4, 1-12 system err
