Dell Latitude L400 Service Manual
  1. Manuals
  2. Brands
  3. Dell Manuals
  4. Laptop
  5. Latitude L400
  6. Service manual
Dell Latitude L400 Service Manual

Dell Latitude L400 Service Manual

Hide thumbs Also See for Latitude L400:
Table of Contents

Advertisement

Quick Links

See also: User Manual
Dell Latitude L400 Service Manual

Advertisement

Table of Contents
loading

Related Manuals for Dell Latitude L400

Summary of Contents for Dell Latitude L400

  • Page 1 Thank you for purchasing this Factory Service Manual CD/DVD from servicemanuals4u.com. Please check out our eBay auctions for more great deals on Factory Service Manuals: servicemanuals4u...
  • Page 2 Dell™ Latitude™ L400 SERVICE MANUAL www.dell.com...
  • Page 3 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 trademarks of Dell Computer Corporation. Other trademarks and trade names may be used in this document to refer to either the entities claiming the marks and names or their products.

  • Page 4: Table Of Contents

    Contents Recommended Tools..........2 Preparing to Work Inside Your Computer .
  • Page 5 Figure 6. Hard-Disk Drive Assembly Removal ..... . . 7 Figure 7. Keyboard Bezel Removal ....... . 8 Figure 8.

  • Page 6: Figure 1. Computer Orientation

    Dell™ Latitude™ L400 Service Manual This manual provides instructions for removing and replacing field-replaceable components, assemblies, and subassemblies in your Dell Latitude computer. Unless otherwise noted, each procedure in this manual assumes the following conditions: • The computer and any attached peripherals are turned off, and the peripherals are disconnected from the I/O panel on the back and right side of the computer.

  • Page 7: Recommended Tools

    8. Turn the computer over and remove the main battery assembly from the battery bay. Slide the battery bay latch toward the right side of the computer to push the back side of the battery up and out of the battery bay (see Figure 2). Dell Latitude L400 Service Manual...

  • Page 8: Screw Identification And Tightening

    NOTICE: When reinstalling a screw, you must use a screw of the correct length. Otherwise, you could damage the hardware. Make sure that the screw is properly aligned with its corresponding hole, and avoid overtightening. support.dell.com Dell Latitude L400 Service Manual...

  • Page 9: Table 1. Screw Placement Mat With Component Screw Counts

    5 mm socket (4 each) with 2 rubber washers each) Speaker: System Board Audio I/O Cover: M2 x 5 mm Assembly: M2 x 4 mm (2 each) (2 each, silver, M2 x 3.5 mm (6 each) with rubber washer) Dell Latitude L400 Service Manual...

  • Page 10: Zif Connectors

    2. Orient the end of the interface cable with the ZIF connector, and insert the end of the cable into the connector. 3. While holding the cable in place, close the ZIF connector. To ensure a firm connection, make sure the ZIF connector is completely closed. support.dell.com Dell Latitude L400 Service Manual...

  • Page 11: Removing Field-Replaceable Parts And Assemblies

    EMI shield modem system board assembly audio I/O port cover speaker APR docking doors bottom case assembly main battery Figure 5. Exploded View—Computer Dell Latitude L400 Service Manual...

  • Page 12: Hard-Disk Drive Assembly

    1. Turn the computer over, and remove the two M3 x 3-mm screws from the bottom of the hard-disk drive door (see Figure 6). The hard-disk drive is located on the right side of the computer. 2. Pull the drive out of the computer. support.dell.com Dell Latitude L400 Service Manual...

  • Page 13: Keyboard Bezel

    1. Place the point of a paper clip or a tool of similar size in the keyboard bezel hole and carefully push down (see Figure 7). 2. While pushing down, slide the keyboard bezel to the left until it releases. 3. Lift the keyboard bezel. Dell Latitude L400 Service Manual...

  • Page 14: Display Assembly

    4. Turn the computer upside down on a flat work surface. 5. Remove the two M2 x 4.5-mm screws at the bottom of the computer that secure the display assembly to the bottom case (see Figure 8). support.dell.com Dell Latitude L400 Service Manual...
  • Page 15 You may have to squeeze the display assembly and the bottom assembly together, so the screw holes align in the base assembly and the hinge posts. Do not completely tighten the screws. Dell Latitude L400 Service Manual...

  • Page 16: Display Assembly Bezel

    LCD flex cable left hinge M2 x 3.5-mm screw M2.6 x 4-mm screws (4) inverter EMI sponges (2) display-assembly top cover right hinge EMI shield Figure 9. Display Assembly Bezel Removal support.dell.com Dell Latitude L400 Service Manual...

  • Page 17: Display Assembly Latch

    (see Figure 10). 3. Slide the latch spring off of the post on the display-assembly top cover (see Figure 10). You may need to use a small flat-blade screwdriver to separate the latch spring from the post. Dell Latitude L400 Service Manual...

  • Page 18: Lcd Panel

    NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer. 1. Ground yourself by touching the unpainted metal surface of the I/O panel on the back of the computer. support.dell.com Dell Latitude L400 Service Manual...
  • Page 19 LCD panel into the right end of the top cover. The right edge of the LCD panel should press against the EMI sponge on the right side of the top cover. The LCD panel should not rest on top of the EMI sponge. Dell Latitude L400 Service Manual...

  • Page 20: Display Assembly Hinges

    5. Remove the two M2.6 x 4-mm screws that secure the right hinge to the top cover. When replacing the left and right hinges, make sure they are installed correctly. An L is stamped on the left hinge and an R is stamped on the right hinge. support.dell.com Dell Latitude L400 Service Manual...

  • Page 21: Keyboard Assembly

    4. Rotate the keyboard up so it is perpendicular to the computer. 5. Carefully disconnect the keyboard cable from the connector on the system board. Dell Latitude L400 Service Manual...
  • Page 22 The keys should be flush with the left and right surfaces of the palmrest. 5. Reinstall the four M2 x 4-mm screws that secure the top of the keyboard assembly to the bottom assembly. 6. Reinstall the keyboard bezel. support.dell.com Dell Latitude L400 Service Manual...

  • Page 23: Memory Module

    The slot on the system board is notched so that the memory module can be firmly seated only one way. 2. With the module at a 45-degree angle, press the memory module’s edge connector firmly into the memory module socket. Dell Latitude L400 Service Manual...

  • Page 24: Palmrest Assembly

    5. Remove the six M2.6 x 1.6-mm screws located in the battery bay (see Figure 14). NOTICE: Make sure that the work surface is clean to prevent scratching the computer cover. 6. Turn the computer right-side up. support.dell.com Dell Latitude L400 Service Manual...

  • Page 25: Figure 15. Removing The Palmrest Assembly Top Screws

    9. Disconnect the status lights flex cable from the ZIF connector on the system board. 10. Disconnect the touch pad flex cable from the ZIF connector on the system board. 11. Carefully remove the palmrest assembly from the bottom assembly. Dell Latitude L400 Service Manual...

  • Page 26: Touch Pad Assembly

    ZIF connector flex cable Figure 16. Touch Pad Removal NOTICE: To avoid damaging the system board, you must remove the main battery before you service the computer. 1. Remove the keyboard bezel. support.dell.com Dell Latitude L400 Service Manual...

  • Page 27: Bottom Assembly

    The bottom assembly consists of the following field-replaceable components: • Reserve battery • Main battery • Modem • Fan assembly • Speaker • System board assembly • Main battery release latch • Bottom case assembly Dell Latitude L400 Service Manual...

  • Page 28: Reserve Battery

    5. Remove the remnants of the foam pad from the system board. Main Battery See the “Preparing to Work Inside Your Computer” section found earlier in this manual for detailed instructions for removing the battery. support.dell.com Dell Latitude L400 Service Manual...

  • Page 29: Modem

    8. Remove the modem retainer bracket from the system board. 9. Pull the modem straight up to disconnect it from the system board. 10. Disconnect the modem cable from the connector on the system board. Dell Latitude L400 Service Manual...

  • Page 30: Fan

    9. Reinstall the display assembly. 10. Reinstall the keyboard bezel. M2 x 8-mm screws with rubber washers (2) connector Figure 20. Fan Removal 1. Remove the keyboard bezel. 2. Remove the display assembly. 3. Remove the keyboard assembly. support.dell.com Dell Latitude L400 Service Manual...
  • Page 31 3. Reconnect the fan wire to the connector on the system board assembly. 4. Replace the palmrest assembly. 5. Replace the keyboard assembly. 6. Replace the display assembly. 7 . Replace the keyboard bezel. Dell Latitude L400 Service Manual...

  • Page 32: Speaker

    (see Figure 21). You only need to peel up the part of the sponge that lies on the thermal cooling solution. The end of the sponge that lies on the audio EMI shield can remain. support.dell.com Dell Latitude L400 Service Manual...
  • Page 33 Carefully position the audio EMI shield so the section with the two-sided tape is over the USB connector housing. b. Press the audio EMI shield down so it attaches to the USB connector housing. c. Reattach the EMI adhesive sponge across the thermal cooling solution. Dell Latitude L400 Service Manual...

  • Page 34: System Board Assembly

    Figure 22. System Board Assembly Removal To remove the system board assembly, perform the following steps. NOTICE: If the EMI sponge located between the battery bay and the USB connector becomes dislodged, reinsert it. support.dell.com Dell Latitude L400 Service Manual...
  • Page 35 11. Remove the six M2 x 3.5-mm screws that secure the system board to the bottom case assembly. White arrows on the system board assembly point to the M2 x 3.5-mm screws. 12. Remove the M2 x 9.5-mm screw that secures the modem retainer bracket. Dell Latitude L400 Service Manual...

  • Page 36: Figure 23. Hard-Disk Drive Emi Clip

    The hole for the M2 x 9.5-mm screw is located by the VGA port. 8. Reinstall the six M2 x 3.5-mm screws that secure the system board assembly to the bottom case assembly. White arrows on the system board assembly point to the screw holes. support.dell.com Dell Latitude L400 Service Manual...

  • Page 37: Main Battery Release Latch

    15. Reinstall the keyboard assembly. 16. Reinstall the display assembly. 17 . Reinstall the keyboard bezel. Main Battery Release Latch tension spring bottom case assembly main battery release latch release button Figure 24. Main Battery Release Latch Removal Dell Latitude L400 Service Manual...

  • Page 38: Apr Docking Doors

    8. Carefully slip the right-edge hinge of the front door off its right hinge pin. 9. Grasping both doors together, carefully slip the left side of each door off their left hinge pins. support.dell.com Dell Latitude L400 Service Manual...
  • Page 39 4. Slip the right hinge of the back door on to the right, back hinge pin. 5. Slip the right hinge of the front door on to the right, front hinge pin. 6. Release the doors so they set into place. Dell Latitude L400 Service Manual...

  • Page 40: Index

    Index APR docking doors removal, hard-disk drive assembly removal, hinge removal, bottom assembly components, keyboard assembly removal, illustrated, latch removal, display assembly LCD panel removal, bezel removal, hinge removal, latch removal, removal, main battery release latch removal, removal, fan removal, memory module removal, field-replaceable parts and modem removal,...

  • Page 41: Figure 16. Touch Pad Removal

    ZIF connectors, system board assembly removal, Dell Latitude L400 Service Manual...

Table of Contents