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Information in this manual is subject to change without notice. 1994–1996 Dell Computer Corporation. All rights reserved. Printed in the United States of America. 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1 Physical Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2 Status Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 Keyboard Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . .
Chapter 3 Beep Codes and Error Messages . . . . . . . . . . . . . . . . . . 3-1 POST Beep Codes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1 System Error Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3 Running the Dell Diagnostics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6 Chapter 4 Removing and Replacing Parts . . . . . . . . . . . . . . . . . . . 4-1 Recommended Tools . . . .
Audio Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-42 Main Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-43 Cache Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-45 Index Figures Figure 1-1. Figure 1-2. Figure 1-3. Figure 4-1. Figure 4-2. Figure 4-3. Figure 4-4. Figure 4-5. Figure 4-6. Figure 4-7. Figure 4-8. Figure 4-9. Figure 4-10. Figure 4-11.
Figure 4-29. Figure 4-30. Figure 4-31. Figure 4-32. Figure 4-33. Figure 4-34. Figure 4-35. Figure 4-36. Figure 4-37. I/R Device Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Power Button Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Touch Pad Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Bottom Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Processor Board Removal . . . . . . . . . . . . . . . . . . . . . . . .
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Read This First A prerequisite for using this manual to service Dell portable computers is a basic knowledge of IBM-compatible PCs and prior training in IBM-compatible PC troubleshooting techniques. In addition to information provided in this manual, Dell provides the Reference and Troubleshooting Guide for troubleshooting procedures and instructions on using the Dell diagnostics to test portable computers, and the online System User’s Guide for information about system setup and operations.
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Chapter 1 System Overview The Dell ® Latitude® LM P-100SD and LM P-133ST are high-performance multimedia portable computers that use the Intel® Pentium® microprocessor. This chapter provides an overview of the components and subsystems of these computers. The individual model names within the Dell Latitude LM portable family indicate the type and operating frequency of the microprocessor and display used in the computer.
warm swapping. However, the CD-ROM must be in the computer before or during boot in order for the drivers to load. • Built-in serial infrared transmitter/receiver, effective to 1 m (3.3 ft). • Support for connecting an external diskette drive to the parallel connector on the I/O panel.
Status Display . Figure 1-3. Status Display Panel The status display panel is located directly above the keyboard. This panel shows icons that indicate keyboard operation or suspend mode; CD-ROM, hard-disk drive, diskette drive, and PC Card activity; and status of the power source (AC power or batteries). Keyboard Indicators The following icons indicate the status of the keyboard and whether the computer is in suspend mode. Caps Lock Indicator Press to activate this feature.
Diskette-Drive Access Indicator This indicator blinks when data is being transferred to or from the internal diskette drive. PC Card Indicator This indicator blinks when the computer is accessing data from an installed PC Card or Cards. AC Power Indicator This indicator appears when the computer is receiving power through an AC power adapter. • If the icon is present but not blinking, the computer is on but the battery is not charging.
• The AC power indicator with the battery status indicator means the battery is defective. • An indicator with one bar on the left means a battery is too hot. Allow the battery to cool to room temperature. • The AC power indicator with the battery status indicator and one bar means that the battery is too hot (40° C [104° F] or more) to start charging. Charging starts automatically when the battery cools to below 40° C.
System Power The power button controls power to the system. The computer receives power from either the AC adapter connected to an AC power source or from up to two batteries. If you use the AC adapter, constant power is available to the computer. If you use one or two batteries, the system has built-in power management features that extend battery life by removing power from parts of the computer that are not being used.
Interrupt Assignments Table 1-1.
Technical Specifications Table 1-2. Technical Specifications Microprocessor Microprocessor type . . . . . . . . Intel Pentium microprocessor Microprocessor speed. . . . . . . 100 or 133 MHz Internal cache memory . . . . . . 16 KB External cache . . . . . . . . . . . . 256 KB Math coprocessor . . . . . . . . . . internal to the microprocessor Chip Set and Bus System chip set. . . . . . . . . . . . Intel 430MX PCIset Data bus width . . . . . . . . . . . . 64 bits DRAM bus width . . . . . . . . . .
Table 1-2. Technical Specifications (Continued) Memory (Continued) Memory access time: tRAC . . . . . . . . . . . . . . . . 70 ns tCAC . . . . . . . . . . . . . . . . 20 ns BIOS address . . . . . . . . . . . . . F000:0000 Connectors Serial (DTE) . . . . . . . . . . . . . . one 9-pin connector; 16,550-compatible, 16-byte buffer Parallel . . . . . . . . . . . . . . . . . . one 25-hole connector; unidirectional, bidirectional, EPP 1.9, or ECP Monitor . . . . . . . . . . . . . . . . . .
Table 1-2. Technical Specifications (Continued) Video Video type. . . . . . . . . . . . . . . . 64-bit (128-bit hardware accelerated) PCI Video controller . . . . . . . . . . . NeoMagic 2070 Video memory . . . . . . . . . . . . 896 KB Active-Matrix Display Type . . . . . . . . . . . . . . . . . . . . active-matrix color (TFT) Dimensions: Height . . . . . . . . . . . . . . . 184.5 mm (7.3 inches) Width . . . . . . . . . . . . . . . . 246.0 mm (9.7 inches) Diagonal . . . . . . . . . . . . . . 307.5 mm (12.
Table 1-2. Technical Specifications (Continued) Dual-Scan Display (Continued) Dot pitch . . . . . . . . . . . . . . . . . 0.29 mm Power consumption. . . . . . . . . 3.4 W Controls. . . . . . . . . . . . . . . . . . brightness and contrast can be controlled through key combinations Keyboard Number of keys. . . . . . . . . . . . 87 (U.S. and Canada); 88 (Europe); 89 (Japan) Key travel . . . . . . . . . . . . . . . . 3.0 ± 0.5 mm (0.12 ± 0.02 inch) Key spacing. . . . . . . . . . . . . . . 19.1 mm (0.
Table 1-2. Technical Specifications (Continued) Main Battery Type . . . . . . . . . . . . . . . . . . . . lithium ion Dimensions: Height . . . . . . . . . . . . . . . . 22.0 mm (0.86 inch) Depth . . . . . . . . . . . . . . . . 219.0 mm (8.62 inches) Width . . . . . . . . . . . . . . . . 57.8 mm (2.27 inches) Weight. . . . . . . . . . . . . . . . . . . 0.44 kg (0.97 lb) Voltage . . . . . . . . . . . . . . . . . . 10.8 VDC Capacity . . . . . . . . . . . . . . . . .
Table 1-2. Technical Specifications (Continued) AC Adapter Input voltage . . . . . . . . . . . . . . 90 to 264 VAC Input current (maximum) . . . . 1.0 A at 100 VAC, full load Input frequency . . . . . . . . . . . . 47 to 63 Hz Output current . . . . . . . . . . . . . 2.6 A (continuous) Output power . . . . . . . . . . . . . 34 W Rated output voltage . . . . . . . . 16.2 VDC Physical: Height . . . . . . . . . . . . . . . . 27.0 mm (1.06 inches) Width. . . . . . . . . . . . . . . . . 60.0 mm (2.
Table 1-2. Technical Specifications (Continued) Environmental (Computer) Temperature: Operating . . . . . . . . . . . . . 5° to 35°C (41° to 95°F) Storage . . . . . . . . . . . . . . . -20° to 50°C (-4° to 122°F) Relative humidity . . . . . . . . . . 10% to 90% (noncondensing) Maximum vibration: Operating . . . . . . . . . . . . . 0.51 GRMS using a random-vibration spectrum that simulates air shipment Storage . . . . . . . . . . . . . . . 1.
Chapter 2 Initial Procedures T his chapter describes initial procedures that can help you diagnose a computer problem. These procedures can often reveal the source of a problem or indicate the correct starting point for troubleshooting the computer. Dell recommends that you perform these initial procedures in the order they are presented. Initial User Contact When you first contact a user who has a problem, ask the user to describe the problem and the conditions under which it occurs.
components, as instructed in the following procedure, see Chapter 4, “Removing and Replacing Parts.” CAUTION: Before you proceed with the visual inspection, ensure that the user has saved all open files and exited all open application programs if possible. To perform a visual inspection, follow these steps: 1. Determine the power state of the computer. If the display is on, go to step 2. If the display is off, press any key to verify that the computer is not in suspend or standby mode.
12. If an external monitor is connected, verify the following: a. The monitor’s interface cable is properly attached to the externalmonitor connector on the computer’s I/O panel. b. The monitor’s power cable is attached to a power source and is free of any obvious physical damage. c. The monitor and its interface cable are free of any obvious physical damage. d. The monitor’s controls are set according to the instructions in the documentation for the monitor. 13.
3. Watch the indicators at the top of the keyboard. Depending on how your computer is configured, after various indicators flash momentarily in the status display panel, some indicators should light up and remain on. Do these indicators light up within seconds after the boot routine starts? Yes. Proceed to step 4. No. Troubleshoot the power subsystem. 4.
Eliminating Resource Conflicts Devices within or connected to the computer may require dedicated memory spaces, interrupt levels, and/or DMA channels. Because different devices can be configured at different times, it is possible the same resource is assigned to two or more devices. Disconnect all peripherals and remove all PC Cards to make sure that the computer failure is not caused by faulty devices.
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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 computer 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.
System Error Messages The following table lists (in alphabetical order) system error messages that may appear on the display during the boot routine or during normal computer operation. Table 3-2. System Error Messages Message Definition Probable Causes Diskette drive A error Connector loose or diskette faulty. Faulty or incorrectly inserted diskette in drive. Faulty diskette drive. Faulty main board.
Table 3-2. System Error Messages (Continued) 3-4 Message Definition Probable Causes Keyboard error Keyboard not responding correctly. Built-in keyboard: Faulty keyboard or key pressed while computer booting. External keyboard: Cable or connector loose. Faulty keyboard or key pressed while computer booting. Operating system not found Operating system cannot be found on harddisk drive or on diskette in diskette drive. Incorrect drive configuration.
Table 3-2. System Error Messages (Continued) Message Definition Probable Causes System CMOS checksum bad—run Setup CMOS has been corrupted or modified, possibly by an application program that changes data stored in CMOS. BIOS has been updated. System RAM failed at offset: nnnn Memory not operating correctly. System RAM failed at address nnnn in the 64-KB block at which error was detected. Faulty or improperly seated memory module. Faulty main board.
Running the Dell Diagnostics CAUTION: To prevent damage to the original diagnostics diskette, always use a backup copy of the diagnostics diskette when servicing a user’s computer. Dell recommends that users make several copies of this diskette to ensure that one is always available. The Dell diagnostics contains tests that aid in troubleshooting the computer.
Chapter 4 Removing and Replacing Parts T his chapter provides procedures for removing and replacing components, assemblies, and subassemblies. Unless otherwise noted, each of the procedures in this chapter assumes the following: • The computer and any attached peripherals are turned off and the peripherals disconnected from the computer’s I/O panel. • A part can be replaced or installed by performing the removal procedure in reverse order.
• Small scribe (or Delrin [plastic] screwdriver) • Nut drivers • Chip removal tool Screw Identification and Tightening . B7 (screw B7 is 3 mm) 3 mm Figure 4-2. Screw Identification CAUTION: It is essential that the correct length screw be used when reinstalling a screw. Otherwise, hardware damage could result. Make sure that the screw is properly aligned with its corresponding hole, and avoid overtightening. Where applicable, information about screw lengths is provided in illustrations.
Precautionary Measures Before performing any of the procedures in this chapter, read the following warning. 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 computer and any attached peripherals. 2. Disconnect the computer and any attached peripherals from AC power sources to reduce the potential for personal injury or shock. 3.
5. Remove the hard-disk drive assembly. Turn the computer over and remove screws HD1 and HD2. Turn the computer right side up. With the computer facing you, slide the hard-disk drive cover to the left and away from the computer. Using the handle on the front of the hard-disk drive, pull the drive straight out of the computer. handle (screws HD1 and HD2 are 10 mm) cover HD1 HD2 10mm Figure 4-4. Hard-Disk Drive Removal 6. Remove the diskette drive, secondary battery, or CD-ROM from the options drive bay.
Keep holding the latch with one hand while pulling the device (diskette drive, secondary battery, or CD-ROM) straight out of the options bay with the other. Figure 4-6. Diskette Drive, Secondary Battery, or CD-ROM Removal 7. Remove any PC Cards To remove a PC Card from the top connector, press the top eject button (identified by an arrow pointing up). To remove a PC Card from the bottom connector, press the bottom eject button (identified by an arrow pointing down).
ZIF Connectors Some of the computer’s interface connectors are zero insertion force (ZIF) connectors. These connectors are not removable; they must be released to disconnect a cable from them. CAUTION: ZIF connectors are fragile. To avoid breaking the connectors, touch them carefully. Do not apply too much pressure to the movable part of the connector when opening or closing it. To disconnect an interface cable from a ZIF connector, follow these steps: 1.
Exploded Views of Components and Assemblies . LCD panel assembly latch (2) keyboard power/ suspend indicator heat sink bottom assembly diskette drive, secondary battery, or CD-ROM hard-disk drive main battery Figure 4-9.
front bezel LCD panel LCD panel flex cable latch power/suspend indicator hinge (2) inverter board back bezel stiffener Figure 4-10.
. keyboard flex cable keyboard keyboard screw cover (2) heat sink hinge cover LCD flexcable cover touch pad button (2) power button spring top assembly touch pad infrared lens touch pad bracket infrared board touch-pad button board speaker (2) plastic housing (2) panel board cable status-display panel board Figure 4-11.
. audio board processor board power board I/O panel door main board cache board I/O bracket bottom assembly memory module cover Figure 4-12.
Factory Repair Parts and Assemblies This section contains a parts list and procedures for removing and replacing factory components and subassemblies. This information is provided for reference only. Dell does not recommend removal and replacement of these parts in the field. Table 4-1 lists the factory repair parts and assemblies available for the computer. Some parts may only be available as part of a kit or assembly.
Table 4-1. Factory Repair Parts and Assemblies (Continued) Part or Assembly Name Order Name Board Assemblies (Continued) Board assembly, 133-MHz, service kit SVC,SYS,PLN,LMP133ST Main board SYS,PLN,3.
Table 4-1. Factory Repair Parts and Assemblies (Continued) Part or Assembly Name Order Name Hard-Disk Drive Assemblies Hard-disk drive, 540-MB, service kit* Hard-disk drive, subassembly, 540-MB CUS,HD,540MB,I,F2,12.5MM,NBK SUBASSY,HD,540MB,LF2, 12.5MM,NBK Hard-disk drive, 540-MB HD,540MB,I,F2,12.5MM,NBK Bracket, hard-disk drive BRKT,HD,12.5MM,LMP Screws, bracket SCR,3X.5X3,FLH,PNH,MS,ZPS,HD Hard-disk drive, 810-MB, service kit* Hard-disk drive, 810-MB CUS,HD,810MB,12.
Table 4-1. Factory Repair Parts and Assemblies (Continued) Part or Assembly Name Order Name LCD Assembly LCD panel, active-matrix color display (TFT), 12.1” LCD,TFT,SVGA,12.1”,LMP,IBM Board, TFT inverter CRD,INVRTR,TFT,LMP Cable, TFT flex CBL,LCD,FLEX,TFT,IBM,LMP Bezel, TFT front BZL,LCD,LMP,IBM Bezel, TFT back CVR,LCD,LMP,IBM LCD panel, dual-scan color display (STN), 11.3” LCD,STN,SVGA,11.
Table 4-1.
Table 4-1. Factory Repair Parts and Assemblies (Continued) Part or Assembly Name Order Name Service Documentation (Continued) Technical sheet, whole unit replacement TSH,WUE,SVC,LMP Technical sheet, memory module TSH,MEM,LMP,ENG Software Diagnostics diskette, service kit, U.S. KIT,DSK,DIAG,V3.58,F3,US Diagnostics diskette, service kit, Spanish KIT,DSK,DIAG,V3.
Table 4-2.
Deleting the Password If a user forgets the password and does not have it backed up on diskette, the user must return the computer to the factory where a service provider will delete the password using the following procedure. The computer will then be returned to the user. C146 Figure 4-13. Capacitor C146 (Location) To delete the password, use the following procedure: 1. Open the computer and remove the keyboard. See “Keyboard” found later in this chapter. 2.
Hard-Disk Drive hard-disk drive E6 E5 carrier flex-cable connector (screws E1–E6 are 4 mm) E3 E1 E4 E2 4 mm Figure 4-14. Hard-Disk Drive Disassembly The hard-disk drive resides in a carrier that mounts in the computer’s hard-disk drive compartment on the front of the computer. Four screws secure the drive inside the carrier. A mylar insulator provides electrical insulation between the hard-disk drive and the rest of the computer.
Diskette Drive diskette drive and carrier Figure 4-15. Diskette Drive Assembly The diskette drive resides in a carrier that slides into the options drive bay on the right side of the computer. The diskette drive and carrier are replaced as a unit and are not disassembled.
CD-ROM CD-ROM and carrier Figure 4-16. CD-ROM Assembly The CD-ROM resides in a carrier that slides into the options drive bay on the right side of the computer. The CD-ROM and carrier are replaced as a unit and are not disassembled.
Memory Module . MM2 MM1 (screws MM1 and MM2 are 3.5 mm) 3.5 mm cover memory module (2) retainer clip Figure 4-17. Memory Module Removal To remove a memory module, follow these steps: 1. Turn the computer over, and remove the two memory-module cover screws. 2. Remove the memory module cover. Grasp the two memory-module retainer clips and release the memory module.
LCD Assembly The LCD assembly consists of the display assembly and its related components. The subsections that follow provide removal and replacement procedures for the components of the LCD assembly. LCD assembly H4 H3 hinge covers (2) (screws H1–H4 are 5 mm) H2 H1 flex-cable cover 5 mm Figure 4-18. LCD Assembly Removal To remove the LCD assembly, follow these steps: 1. With the computer closed and the back facing you, remove the two hinge covers.
Front Bezel H6 bezel screw cover (2) H7 (screws H6 and H7 are 4.5 mm) front bezel 4.5 mm hidden tabs NOTE: This figure shows the STN LCD assembly, which has the same front bezel as the TFT LCD assembly. Figure 4-19. Front Bezel Removal To remove the front bezel, follow these steps: 1. Remove the LCD assembly. See the previous section, “LCD Assembly.” 2. With the front facing you, open the computer 3. Lay the LCD assembly back on a book or something similar to prop the assembly. 4.
LCD Panel There are two types of LCD panels: the dual-scan color display (STN) and the active-matrix color display (TFT). The removal process for both LCD panels is the same. H13 H11 H14 LCD panel H12 LCD flex cable power/ suspend indicator (screws H11–H14 are 6 mm) H16 upper connector H15 6 mm (screws H15 and H16 are 3 mm) microphone inverter board lower connector 3 mm . Figure 4-20. LCD Panel Removal To remove an LCD panel, follow these steps: 1. Remove the front bezel.
Inverter Board power/ suspend indicator H16 H15 (screws H15 and H16 are 3 mm) 3 mm inverter board . Figure 4-21. Inverter Board Removal To remove the inverter board, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Remove the LCD panel. See the previous subsection, “LCD Panel.” 3. Disconnect the power/suspend indicator connector. 4. Remove inverter board screws H15 and H16. 5. Remove the inverter board from the back bezel.
LCD Assembly Latches spring (2) latch (2) back bezel Figure 4-22. LCD Assembly Latches Removal To remove the LCD assembly latches, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Place the back bezel down on a work surface. 3. Use a scribe to pry the latches from the back bezel. Be careful not to lose the small spring that is part of each latch.
Power/Suspend Indicator power/suspend indicator back bezel power/suspend indicator connector inverter board Figure 4-23. Power/Suspend Indicator Removal To remove the power/suspend indicator, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Remove the LCD panel. See “LCD Panel” found earlier in this section. 3. Remove the power/suspend indicator. Disconnect the power status connector from the inverter board.
Back Bezel back bezel Figure 4-24. Back Bezel Removal To remove the back bezel, follow these steps: 1. Remove the front bezel. See “Front Bezel” found earlier in this section. 2. Remove the LCD panel. See “LCD Panel” found earlier in this section. NOTE: Be careful when removing any part of the LCD flex cable. 3. Remove the inverter board. See “Inverter Board” found earlier in this section. 4. Remove the latches. See “LCD Assembly Latches” found earlier in this section. 5.
Keyboard This section provides the removal procedure for the keyboard. Also, it includes the removal procedure for the heat sink. S1 screw covers (2) S2 keyboard cable S3 S4 heat sink main board (screws S1 and S2 are 3 mm) 3 mm (screws S3 and S4 are 5.5 mm) 5.5 mm Figure 4-25. Keyboard Removal To remove the keyboard, follow these steps: 1. Open the computer. 2. Remove the keyboard screw covers. 3. Remove keyboard screws S1 and S2.
4. Remove heat sink screws S3 and S4. Lift off the heat sink. CAUTION: Lift away the heat sink gently. Rough handling could damage the thermal pad on the bottom of the heat sink. 5. Disconnect the keyboard cable from the main board. Use a small flat-blade screwdriver to release the ZIF connector securing the keyboard cable. CAUTION: Lift away the cable only after the ZIF connector is opened (see “ZIF Connectors” found earlier in this chapter).
Top Assembly The top assembly consists of the plastic palm rest and its related components. The subsections that follow provide removal and replacement procedures for the components of the top assembly. keyboard Production Note!!! hinge cover (2) display close button top assembly SD1 SD2 touch pad connector hook SD3 main board (screws SD1 and SD2 are 5 mm) SD4 5 mm (screws SD3 and SD4 are 3 mm) bottom assembly Figure 4-26.
To remove the top assembly, follow these steps: 1. Remove the LCD panel. See “LCD Panel” found earlier in this chapter. 2. Remove the keyboard. See the previous section, “Keyboard.” 3. Remove side screws SD1 and SD2. 4. Disconnect the touch pad connector. Use a small flat-blade screwdriver to release the connector from the main board. 5. Separate the top assembly from the bottom assembly.
Speakers speaker (2) top assembly plastic housing (2) (screws S5 and S6 are 3 mm) 3 mm S22 (screws S22 and S23 are 6 mm) S5 speaker connector status display S6 S23 board 6 mm Figure 4-27. Speakers Removal To remove the speakers, follow these steps: 1. Remove the top assembly. See the previous section, “Top Assembly.” 2. Remove speaker screws S5, S6, S22, and S23. Remove the plastic housing holding the speakers. 3. Disconnect the speaker connectors from both ends of the status display board. 4.
Status Display Board top assembly infrared device connector speaker connector (2) S7 (screws S7–S9 are 6 mm) S8 S9 6 mm statusdisplay board connector status display board Figure 4-28. Status Display Board Removal To remove the status display board, follow these steps: 1. Remove the top assembly. See “Top Assembly” found earlier in this section. 2. Remove status-display board screws S7, S8, and S9. 3.
I/R Device recess top assembly I/R lens I/R connector Figure 4-29. I/R Device Removal To remove the infrared (I/R) device, follow these steps: 1. Remove the top assembly. See “Top Assembly” found earlier in this section. 2. Disconnect the I/R device connector from the status display board. 3. Dislodge the I/R device from the recess on the top assembly. Thread the I/R connector and wires through the opening on the top assembly. 4. Remove the I/R device from the top assembly.
Power Button power button spring Figure 4-30. Power Button Removal To remove the power button, follow these steps: 1. Remove the top assembly. See “Top Assembly” found earlier in this section. 2. Remove the status display board. See “Status Display Board” found earlier in this section. 3. Remove power button. There are four plastic retainers that hold the power button and spring in place. 4. Remove the power button and spring from the top assembly.
Touch Pad button (2) top assembly touch pad touch pad bracket touch-pad cable connector S14 S15 flex cable (screws S11– S15 are 3 mm) S11 touch-pad button board S12 S13 3 mm Figure 4-31. Touch Pad Removal To remove the touch pad, follow these steps: 1. Remove the top assembly and turn it over. See “Top Assembly” found earlier in this section. 2. Remove touch pad screws S11, S12, and S13. Place the touch-pad button board to one side. The board has a flex cable that attaches to the touch pad. 3.
Bottom Assembly This bottom assembly consists of a plastic base, the main board, and the main board components. The subsections that follow provide removal and replacement procedures for the components of the bottom assembly. processor board power supply board audio board main board cache board options bay wall base Figure 4-32.
Processor Board processor board processor board connector (2) main board Figure 4-33. Processor Board Removal To remove the processor board, follow these steps: 1. Open the cover. 2. Remove the keyboard. See “Keyboard” found earlier in this chapter. 3. Remove the processor board from the main board. The processor board is held in place on the main board by two connectors. Use a chip removal tool to remove the processor board.
Power Supply Board power supply board main board Figure 4-34. Power Supply Board Removal To remove the power supply board, follow these steps: 1. Open the cover. 2. Remove the top assembly. See “Top Assembly” found earlier in this chapter. 3. Remove the power supply board from the main board. The power supply board is held in place on the main board by two connectors.
Audio Board audio board audio cable plastic holder audio board connector main board Figure 4-35. Audio Board Removal To remove the audio board, follow these steps: 1. Open the cover. 2. Remove the top assembly. See “Top Assembly” found earlier in this chapter. 3. Remove the cable from the audio board. 4. Remove the audio board from the main board. The audio board is held in place on the main board by a connector on one side of the audio board.
Main Board I/O panel cover S17 S8 ST7 ST9 S18 S19 ST6 ST5 ST4 ST3 ST2 ST1 S16 S20 I/O panel bracket main board (screw S18 is 8 mm) (screw ST9 is 4 mm) (screws ST1–ST6 are 6.5 mm) 6 mm 4 mm 6.5 mm (screws S19– S20 are 5 mm) (screws S16 and S17 are 4 mm) 5 mm (screws ST7 and ST8 are 4.5 mm) 4 mm 4.5 mm Figure 4-36. Main Board Removal To remove the main board, follow these steps: 1. Open the cover. 2. Remove the top assembly. See “Top Assembly” found earlier in this chapter. 3.
6. Turn the computer around, open the I/O panel cover, and remove standoff nuts ST1, ST2, ST3, ST4, ST5, ST6, ST7, and ST8. Use a 3/16 nut driver to remove standoff nuts ST1 through ST6 and a 7/32 nut driver for ST7 and ST8. 7. Remove cover alignment screws S16 and S17. 8. Remove main board screws S18, S19, S20, and ST9. S18 has a corner brace that must be removed. ST9 is a standoff screw and requires a 5/32 nut driver. 9. Bend the options bay wall (see Figure 4-32).
Cache Board main board audio board cache board Figure 4-37. Cache Board Removal To remove the cache board, follow these steps: 1. Open the cover. 2. Remove the main board. See the previous subsection, “Main Board.” 3. Turn the main board over. 4. Remove the cache board from the main board. The cache board is held in place on the bottom of the main board by two connectors.
4-46 Dell Latitude LM Systems Service Manual
Index A C AC adapter connector, 1-2 cache board removal, 4-45 AC Power indicator, 1-4 Caps Lock indicator, 1-3 audio board removal, 4-42 CD-ROM disassembly, 4-21 CD-ROM/Hard-Disk Drive indicator, 1-3 B back bezel illustrated, 4-29 removal, 4-29 battery main, removal, 4-3 optional, removal, 4-4 computer features, 1-1 illustrated, 1-2 power conservation modes, 1-6 technical specifications, 1-8 computer power, 1-6 Battery Activity indicator, 1-4 D battery charge gauge, 1-5 Dell diagnostics, 3-6
E I eliminating resource conflicts, 2-5 I/O panel, 1-2 error messages, 3-3, 3-6 infrared device removal, 4-36 ESD, 4-3 infrared port, 1-2 expansion connector, 1-2 initial procedures beep codes, 3-1 system error messages, 3-3 troubleshooting, 2-1 exploded view bottom assembly, 4-10 computer, 4-7 LCD assembly, 4-8 top assembly, 4-9 external video connector, 1-2 initialization error messages, 3-6 Internal Diskette-Drive Access indicator, 1-4 interrupt assignments list of, 1-7 F inverter board rem
M main battery location, 4-3 removal, 4-3 main-battery compartment, 1-2 memory maximum configuration, 1-1 system memory, 1-1 POST beep codes about, 3-1 list of, 3-2 power computer, 1-6 power button location, 1-2 removal, 4-37 power conservation, 1-6 memory module capacities supported, 1-1 removal, 4-22 power status indicator, 1-2 microphone, 1-2, 4-26 power supply board removal, 4-41 microphone jack, 1-2 precautionary measures, 4-3 microprocessor, 1-1 processor board removal, 4-40 N R naming con
status display board removal, 4-35 status display panel about, 1-3 location, 1-2 subsystems testing, 3-6 suspend mode, 1-6 Suspend Mode indicator, 1-3 troubleshooting boot routine, 2-3 initial procedures, 2-1 initial user contact, 2-1 POST beep codes, 3-1 running the Dell diagnostics, 3-6 system error messages, 3-3 visual inspection, 2-1 turning off the hard-disk drive, 1-6 suspend-to-disk mode, 1-6 system error messages about, 3-3 Dell diagnostics, 3-6 list of, 3-3 U user contact initial, 2-1 system po
