Dell Latitude LM Service Manual

Dell Latitude LM Manual

Dell Latitude LM manual content summary:

  • Dell Latitude LM | Service Manual - Page 1
    'HOO® /DWLWXGH® /0 6(59,&(0$18$/ ®
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    . Reproduction in any manner whatsoever without the written permission of Dell Computer Corporation is strictly forbidden. Trademarks used in this text: Dell, the DELL logo, and Latitude are registered trademarks of Dell Computer Corporation; MS-DOS is a registered trademark of Microsoft Corporation
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    Keyboard Indicators 1-3 CD-ROM/Hard-Disk Drive Indicator 1-3 Diskette-Drive Access Indicator 1-4 PC Card Indicator 1-4 AC Power Indicator 1-4 Battery Activity Indicator 1-4 Battery Status Indicator 1-4 Battery Charge Gauge 1-5 Password 1-5 System Power 1-6 Power Conservation 1-6 Interrupt
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    4-7 Factory Repair Parts and Assemblies 4-11 Deleting the Password 4-18 Hard-Disk Drive 4-19 Diskette Drive 4-20 CD-ROM 4-21 Memory Module 4-22 LCD Assembly 4-23 Front Bezel 4-24 LCD Panel 4-25 Inverter Board 4-26 Microphone 4-26 LCD Assembly Latches 4-27 Power/Suspend Indicator
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    Display Panel 1-3 Figure 4-1. Computer Orientation 4-1 Figure 4-2. Screw Identification 4-2 Figure 4-3. Main Battery Removal 4-3 Figure 4-4. Hard-Disk Drive Removal 4-4 Figure 4-5. Options Bay Lock and Latch 4-4 Figure 4-6. Diskette Drive, Secondary Battery, or CD-ROM Removal. . . 4-5 Figure
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    Assembly 4-39 Figure 4-33. Processor Board Removal 4-40 Figure 4-34. Power Supply Board Removal 4-41 Figure 4-35. Audio Board Removal 4-42 Figure 4-36 Interrupt Assignments 1-7 Technical Specifications 1-8 POST Beep Codes 3-2 System Error Messages 3-3 Factory Repair Parts and Assemblies 4-
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    ix
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    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
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    xi
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    xii
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    audio). • An options bay that lets users replace the secondary lithium ion battery or diskette drive without turning off or rebooting the computer. This feature is sometimes called hot swapping. The CD-ROM can be inserted or removed while the computer is in suspend mode. This feature is sometimes
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    parallel port connector monitor connector I/O panel service tag number expansion connector PS/2 connector headphones/speakers connector external microphone connector AC adapter connector PC Card slots Figure 1-2. Back View of the Portable Computer 1-2 Dell Latitude LM Systems Service Manual
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    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
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    Indicator The battery status indicator reflects the state of the main or secondary battery in the computer when the computer is off. No indicator means there is no battery (main or secondary) in the computer or, if present, the battery has been discharged. 1-4 Dell Latitude LM Systems Service Manual
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    and does not have it on diskette, the computer cannot be accessed. In that case, the computer must be returned to Dell at the user's expense. Dell technicians will erase the password by shorting C146, recharge the CMOS battery, and send the computer back at the user's expense. For the procedure
  • Dell Latitude LM | Service Manual - Page 16
    . • Turning off the hard-disk drive - To activate this feature, set the HARD-DISK TIME-OUT option in the Power Menu of the Setup program. The computer automatically turns the hard-disk drive back on the next time the microprocessor accesses the drive. 1-6 Dell Latitude LM Systems Service Manual
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    the output buffer of the integrated touch pad or external PS/2 mouse is full Used by the math coprocessor on the microprocessor Generated by the hard-disk drive to indicate that the drive requires the attention of the microprocessor Reserved System Overview 1-7
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    size . . . . . 68 pins Data width (maximum) . . . . . 32 bits Memory Architecture fast-page mode, two-way interleaved Memory module capacities . . 4, 8, and 16 MB; must be installed in matched pairs Standard RAM 8 MB on system board Maximum RAM 40 MB 1-8 Dell Latitude LM Systems Service Manual
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    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
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    : Height 172.8 mm (6.8 inches) Width 230.4 mm (9.1 inches) Diagonal 287.0 mm (11.3 inches) Maximum resolution 800 x 600 pixels; 256 colors Refresh rate (typical 70 Hz Response time (typical) . . . . . 300 ms Operating angle 0° (closed) to 135° 1-10 Dell Latitude LM Systems Service Manual
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    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 (0.52 ounce) ± 0.5 g (0.001 ounce) Power: Supply voltage 5 V ± 10% Supply current 4 mA (maximum operating current) System Overview 1-11
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    (32° to 104°F) Discharge 0° to 60°C (32° to 140°F) Storage 20° to 50°C (-4° to 122°F) 1 Battery performance features such as charge time, operating time, and life span can vary according to the conditions under which the computer and battery are used. 1-12 Dell Latitude LM Systems Service Manual
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    50°C (-4° to 122°F) Physical (Computer) Height 49.5 mm (1.95 inches) Width 299.9 mm (11.8 inches) Depth 228.7 mm (8.93 inches) Weight (with hard-disk drive, diskette drive, battery, and two PC Card blanks): Dell Latitude LM P100SD 3.1 kg (6.9 lb) Dell Latitude LM P133ST 3.1 kg (6.9 lb) System
  • Dell Latitude LM | Service Manual - Page 24
    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 ft) 2 Measured with the hard-disk drive in head-parked position. 1-14 Dell Latitude LM Systems Service Manual
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    the appropriate troubleshooting procedure to use. After the user describes the problem, follow these steps: 1. Ask the user to back up any data on the hard-disk drive if the com- puter's condition permits. See the "Maintaining Your Computer" section of the online System's User's Guide. 2. Ask the
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    the AC adapter and the wall outlet. The AC adapter's LED should be on. b. The AC adapter's DC power cable is properly connected to the com- puter's AC adapter connector. c. The AC adapter and cables are free of any obvious physical damage. 5. If the computer is operating from battery power, remove
  • Dell Latitude LM | Service Manual - Page 27
    of the diagnostics diskette when servicing a user's computer. Dell recommends that users make copies of the Dell Diagnostics Diskette. For instructions, see "Before You Start Testing" in Chapter 4 of the Dell Latitude LM Reference and Troubleshooting Guide. To observe the boot routine, follow these
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    copy of the diagnostics diskette into the diskette drive, and reboot the computer. Does the Diagnostics Menu appear on the display? Yes. See "Running the Dell Diagnostics" in Chapter 3. No. Proceed to the next section, "Eliminating Resource Conflicts." 2-4 Dell Latitude LM Systems Service Manual
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    Your Computer," in the Reference and Troubleshooting Guide. Getting Help If none of the procedures in this chapter reveal the source of the problem or lead to the proper troubleshooting steps for determining the source of the problem, contact Dell for technical assistance. For instructions, see
  • Dell Latitude LM | Service Manual - Page 30
    2-6 Dell Latitude LM Systems Service Manual
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    tests to help isolate the source of the problem. See "Running the Dell Diagnostics" found later in this chapter. POST Beep Codes If the display cannot display error messages during POST, the computer may emit a series of beeps that identify the problem or that can help you identify a faulty
  • Dell Latitude LM | Service Manual - Page 32
    of high byte on memory faulty main board bus RAM failure on data bits Faulty memory module or nnnn of low byte on memory faulty main board bus Check ROM copyright notice failure Faulty main board Interrupt mask register failure Faulty main board 3-2 Dell Latitude LM Systems Service Manual
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    . Faulty main board. Fixed disk 0 failure Hard-disk drive not responding to commands from computer. Corrupted hard-disk drive boot sector or configuration file. Faulty hard-disk drive. Faulty main board. Fixed disk controller failure Hard-disk drive or controller not responding to commands from
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    improperly address nnnn. seated memory mod- ule. Faulty main board. System battery is dead-Replace and run Setup CMOS battery dead. Faulty CMOS battery or main board. System cache error-cache disabled Primary cache failed. Faulty microprocessor. 3-4 Dell Latitude LM Systems Service Manual
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    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
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    tests to quickly locate a computer failure or to indicate where further testing is needed to isolate a failure • RUN ALL TESTS - Runs all tests for a thorough test of the computer • RUN SPECIFIC TESTS - Tests a particular area or subsystem of the computer 3-6 Dell Latitude LM Systems Service Manual
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    - als disconnected from the computer's I/O panel. • A part can be replaced or installed by performing the support the display assembly. The angle of the display assembly with respect to the bottom case should not exceed 135 degrees. Also, assume that locations or directions relative to the computer
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    • 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. a screw, match the screw to the screw length graphics provided to check for correct length. 4-2 Dell Latitude LM Systems Service Manual
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    mode. Then proceed to step 2. 2. Turn off the computer and any attached peripherals. 3. Disconnect the computer and any attached peripherals from AC power sources to reduce the potential for personal injury or shock. 4. Remove the main battery from the battery compartment. On the right side of the
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    the hard-disk drive, pull the drive straight out of the computer. handle cover HD1 HD2 Figure 4-4. Hard-Disk Drive Removal (screws HD1 and HD2 are 10 mm) 10mm 6. Remove the diskette drive, secondary battery, or CD-ROM from the options drive bay. NOTE: The options bay allows the user to replace
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    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 the bottom eject button. Figure 4-7. PC Card Removal Removing and Replacing Parts 4-5
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    ZIF Connectors Some of the computer's interface connectors are zero insertion force (ZIF) connectors. These connectors are not the cable in place, close the ZIF connector. To ensure a firm connection, make sure the ZIF connector is completely closed. 4-6 Dell Latitude LM Systems Service Manual
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    Exploded Views of Components and Assemblies . power/ suspend indicator heat sink LCD panel assembly latch (2) keyboard bottom assembly diskette drive, secondary battery, or CD-ROM hard-disk drive main battery Figure 4-9. Exploded View-Computer Removing and Replacing Parts 4-7
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    LCD panel front bezel LCD panel flex cable latch hinge (2) power/suspend indicator inverter board back bezel stiffener microphone inverter board connector Figure 4-10. Exploded View-LCD Assembly 4-8 Dell Latitude LM Systems Service Manual
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    cover (2) hinge cover touch pad button (2) touch pad touch pad bracket touch-pad button board keyboard heat sink LCD flexcable cover power button spring top assembly infrared lens infrared board speaker (2) plastic housing (2) status-display panel board Figure 4-11. Exploded View-Top Assembly
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    . audio board processor board main board cache board bottom assembly power board I/O panel door I/O bracket memory module cover Figure 4-12. Exploded View-Bottom Assembly 4-10 Dell Latitude LM Systems Service Manual
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    that are replaceable by a customer. . Table 4-1. Factory Repair Parts and Assemblies Part or Assembly Name Order Name AC Adapter/Power Cables AC Adapter, service kit* CUS,ADPT,AC,EXT,16.2V,34W, LMP AC Adapter* ADPT,AC,EXT,16.2V,34W,LMP Cable, power, U.S. CORD,PWR,110V,6F,AC ADPT,US
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    * CUST,FD,INT/EXT,LMP Diskette drive, internal/external FD,INT/EXT,LMP Case, upper PLSTC,UPR,FD,LMP Case, lower PLSTC,LWR,FD,LMP Cable, service kit* CUST,CBL,FD,INT/EXT,LMP Connector, cable CBL,FD,INT/EXT,LMP * Customer-replaceable unit (CRU) 4-12 Dell Latitude LM Systems Service Manual
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    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 CUS,HD,540MB,I,F2,12.5MM,NBK kit* Hard-disk drive, subassembly, SUBASSY,HD,540MB,LF2, 540-MB 12.5MM,NBK Hard-disk drive, 540-MB HD,540MB,I,
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    Table 4-1. Factory Repair Parts and Assemblies (Continued) hard-disk drive BZL,HDD,LMP Cover, hinge/infrared lens, right CVR,PLSTC,IR,LMP Cover, hinge, left CVR,HNG,LF,LMP Cover, keyboard screws CVR,SCR,KYBD,LMP * Customer-replaceable unit (CRU) 4-14 Dell Latitude LM Systems Service Manual
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    ) standoff Service Documentation Service Manual MNL,SERVICE,LMP Technical sheet, hard-disk drive TSH,HD,LMP,ENG Technical sheet, options bay TSH,OPT,BAY,LMP,ENG Technical sheet, AC adapter TSH,AC ADAPT,LMP,ENG Technical sheet, main battery TSH,BTRY,LMP,ENG Removing and Replacing Parts
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    button SPR,PWR,KNOB,LMP Button, power BTN,PWR,LMP Touch Pad Touch pad assembly ASSY,TPAD,LMP Cable, touch pad CBL,FLEX,TPAD,LMP Card, touch-pad switch SWT,CRD,TPAD,LMP Card, touch pad CRD,TPAD,LMP Insulator, touch pad INSUL,MYLAR,TPAD,LMP 4-16 Dell Latitude LM Systems Service Manual
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    Table 4-2. Naming Conventions Name in This Manual Name in Other Documents Main board Mother board assembly Processor board CPU daughter base assembly Bottom plastics Top assembly Palm rest plastics Infrared board I/R PWA Diskette drive Floppy-disk drive Removing and Replacing Parts 4-17
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    ) To delete the password, use the following procedure: 1. Open the computer and remove the keyboard. See "Keyboard" found later in this chapter. 2. Place a short across the terminals of capacitor C146. 3. Allow time for the CMOS battery to recharge. 4-18 Dell Latitude LM Systems Service Manual
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    Hard-Disk Drive hard-disk drive E6 E5 flex-cable connector E3 E4 E1 E2 Figure 4-14. Hard-Disk Drive Disassembly carrier (screws E1-E6 are 4 mm) 4 mm 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
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    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. 4-20 Dell Latitude LM Systems Service Manual
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    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. Removing and Replacing Parts 4-21
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    pair, both slots must be filled, and both slots must have the same memory capacity. The following combinations are possible: • 16 MB - Install two 4-MB memory modules. • 24 MB - Install two 8-MB memory modules. • 40 MB - Install two 16-MB memory modules. 4-22 Dell Latitude LM Systems Service Manual
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    its related components. The subsections that follow provide removal and replacement procedures for the components of the LCD assembly. LCD assembly 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. Pop
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    LCD Assembly." 2. With the front facing you, open the computer 3. Lay the LCD assembly back on a book or replacing the front bezel, orient the bezel in its original position on the assembly and press firmly near each tab until the bezel snaps into place. 4-24 Dell Latitude LM Systems Service Manual
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    the same. H13 H11 LCD panel H14 H12 LCD flex cable (screws H11-H14 are 6 mm) H16 H15 power/ suspend indicator upper connector 6 mm (screws H15 and H16 are 3 mm) microphone inverter board lower connector 3 cable from the lower inverter-board connector. Removing and Replacing Parts 4-25
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    , "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. Microphone The microphone cannot be removed separately; it is part of the inverter board. 4-26 Dell Latitude LM Systems Service Manual
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    a scribe to pry the latches from the back bezel. Be careful not to lose the small spring that is part of each latch. Removing and Replacing Parts 4-27
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    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. Lift the indicator out of the recess in the top of the back bezel. 4-28 Dell Latitude LM Systems Service Manual
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    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. Remove the power/suspend indicator. See the previous subsection, "Power/Suspend Indicator." Removing and Replacing Parts 4-29
  • Dell Latitude LM | Service Manual - Page 66
    . 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. Lay the keyboard back against the LCD assembly or a prop to avoid detaching the keyboard cable. 4-30 Dell Latitude LM Systems Service Manual
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    earlier in this chapter). Pulling the cable from the connector damages the conductive coating on the end of the cable. 6. Remove the keyboard from the computer. Removing and Replacing Parts 4-31
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    plastic palm rest and its related components. The subsections that follow provide removal and replacement procedures for the components of the top assembly. keyboard hinge cover (2) top are 3 mm) bottom assembly 3 mm Figure 4-26. Top Assembly Removal 4-32 Dell Latitude LM Systems Service Manual
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    from the main board. Release the wire bundle from the hook on the I/O bracket. 7. Remove the power supply board. 8. Disconnect the LCD flex-cable connector on the main board. Remove flex-cable screws SD3 top assembly. 9. Remove the top assembly from the computer. Removing and Replacing Parts 4-33
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    status display board. 4. Remove the pieces of plastic tape holding the connector wires to the top assembly. 5. Remove the speakers from the top assembly. 4-34 Dell Latitude LM Systems Service Manual
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    connector wire assembly is held in place by a metal hook located on the I/O bracket. 5. Remove the status display board from the top assembly. Removing and Replacing Parts 4-35
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    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. 4-36 Dell Latitude LM Systems Service Manual
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    . 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. Removing and Replacing Parts 4-37
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    touch-pad bracket screws S14 and S15. Remove the touch pad bracket. 5. Remove the touch pad bracket and touch pad from the top assembly. 4-38 Dell Latitude LM Systems Service Manual
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    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 audio board power supply board cache board Figure 4-32. Bottom Assembly main board options bay wall base Removing and
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    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. 4-40 Dell Latitude LM Systems Service Manual
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    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. Removing and Replacing Parts
  • Dell Latitude LM | Service Manual - Page 78
    audio board is held in place by a clasp and two projections. The clasp and projections are on a plastic holder. Lift out the plastic holder. 4-42 Dell Latitude LM Systems Service Manual
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    . See "Top Assembly" found earlier in this chapter. 3. Remove the power supply board. See "Power Supply Board" found earlier in this section. 4. Remove the audio card. See the previous subsection, "Audio Board." 5. Remove the black mylar cover on the PC Card cage. Removing and Replacing Parts 4-43
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    board, bend the wall back to the vertical position. 10. Remove the main board. Lift the end of the board nearest the front of the computer, and pull the board up and out of the computer. 4-44 Dell Latitude LM Systems Service Manual
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    cache board from the main board. The cache board is held in place on the bottom of the main board by two connectors. Removing and Replacing Parts 4-45
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    4-46 Dell Latitude LM Systems Service Manual
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    when troubleshooting, 2-3 bottom assembly, 4-39 C cache board removal, 4-45 Caps Lock indicator, 1-3 CD-ROM disassembly, 4-21 CD-ROM/Hard-Disk Drive indicator, 1-3 computer features, 1-1 illustrated, 1-2 power conservation modes, 1-6 technical specifications, 1-8 computer power, 1-6 D Dell
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    view bottom assembly, 4-10 computer, 4-7 LCD assembly, 4-8 top assembly, 4-9 external video connector, 1-2 F factory repair parts and assemblies list of, 4-11 field-replaceable parts and assemblies, 4-1, 4-7 front bezel removal, 4-24 G getting help, 2-5 H hard-disk drive location, 1-2 removal, 4-19
  • Dell Latitude LM | Service Manual - Page 85
    3-1 list of, 3-2 power computer, 1-6 power button location, 1-2 removal, 4-37 power conservation, 1-6 power status indicator, 1-2 power status indicator removal, 4-28 power supply board removal, 4-41 precautionary measures, 4-3 processor board removal, 4-40 R removal and replacement procedures field
  • Dell Latitude LM | Service Manual - Page 86
    messages about, 3-3 Dell diagnostics, 3-6 list of, 3-3 system power, 1-6 T technical specifications, 1-8 tools recommended field replaceable parts and assemblies, 4-1 top assembly removal, 4-32 touch pad location, 1-2 removal, 4-38 touch pad buttons, 1-2 troubleshooting boot routine, 2-3 initial
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