Back to Contents Page

System Board Assembly

Dell™ Latitude™ E6400 and E6400 ATG and
Mobile Workstation Precision™ M2400 Service Manual

  Removing the System Board Assembly

  Replacing the System Board Assembly

The system board's BIOS chip contains the Service Tag, which is also visible on a barcode label on the bottom of the computer. The replacement kit for the system board includes media that provides a utility for transferring the Service Tag to the replacement system board.

Removing the System Board Assembly

CAUTION: Before you begin the following procedure, follow the safety instructions that shipped with your computer.

1. Follow the instructions in Before Working on Your Computer.
   
   
2. Remove the bottom of the base assembly (see Removing the Bottom of the Base Assembly).
   
   
3. Remove the card in the WWAN/FCM card slot, if present (see Removing a WWAN Card or Removing an FCM from the WWAN/FCM Slot).
   
   
4. Remove the card from the WLAN/WiMax card slot, if present (see Removing the WLAN/WiMax Card).
   
   
5. Remove the hinge covers (see Removing the Hinge Covers).
   
   
6. Remove the card from the WPAN/UWB/FCM card slot, if present (see Removing a WPAN (UWB/BT) Card or Removing an FCM from the WPAN/UWB/FCM Slot).
   
   
7. Remove the memory modules (see Removing a Memory Module).
   
   
8. Remove the heatsink assembly (see Removing the Processor Heatsink Assembly).
   
   
9. Remove the processor (see Removing the Processor Module).
   
   
10. Disconnect the coin-cell battery cable from the system board.
    
    
11. Remove the hard drive (see Removing the Hard Drive).
    
    
12. Remove the modular drive (see Removing the Modular Drive).
    
    
13. Remove the display assembly (see Removing the Display Assembly (E6400 and M2400) or Removing the Display Assembly (E6400 ATG)).
    
    
14. Remove the LED cover (see Removing the LED Cover).
    
    
15. Remove the keyboard (see Removing the Keyboard).
    
    
16. Remove the right speaker grill (see Removing the Right Speaker Grill/Fingerprint Reader Assembly).
    
    
17. Remove the palm rest assembly (see Removing the Palm Rest Assembly).
    
    
18. Remove the card cage (see Removing the Card Cage).
    
    
19. Disconnect the smart card cable from the system board.
    
    
20. Disconnect the 1394 daughtercard cable from the system board, and unroute the cable from the system board.
    
    
21. Remove three M2.5 x 5-mm screws labeled with white arrows from the system board.
    
    
22. Pull out on the top-left corner of the base assembly to release the connectors, while lifting the top-left corner of the system board.
    
    
23. Lift the top-right corner of the system board to disconnect the system board from the I/O card.
    
    
24. Disconnect the DC cable, which is connected to the bottom of the system board.
    
    
25. Lift the system board out of the base assembly.
    
    

Replacing the System Board Assembly

CAUTION: Before you begin the following procedure, follow the safety instructions that shipped with your computer.

NOTICE: Ensure that any loose cables do not get caught beneath the system board.

1. Place the front-edge of the system board into the base of the computer, ensuring the system board fits under the metal LCD latch mechanism in the front center of the base assembly.
   
   
2. Connect the DC power cable to the bottom of the system board.
   
   
3. Place the top-left corner of the system board in the base assembly.
   
   
4. Push down on the top-right corner of the system board to connect it to the I/O card.
   
   
5. Replace the three M2.5 x 5-mm screws on the system board in the holes labeled with white arrows.
   
   
6. Route and connect the 1394 card cable to the connector on the system board. Press down on the cable to adhere it to the system board.
   
   
7. Connect the smart card cable to the connector on the system board.
   
   
8. Replace the card cage (see Replacing the Card Cage).
   
   
9. Replace the palm rest assembly (see Replacing the Palm Rest Assembly).
   
   
10. Replace the right speaker grill (see Replacing the Right Speaker Grill/Fingerprint Reader Assembly).
    
    
11. Replace the keyboard (see Replacing the Keyboard).
    
    
12. Replace the LED cover (see Replacing the LED Cover).
    
    
13. Replace the display assembly (see Replacing the Display Assembly (E6400 and M2400) or Replacing the Display Assembly (E6400 ATG)).
    
    
14. Replace the modular drive (see Replacing the Modular Drive).
    
    
15. Replace the hard drive (see Replacing the Hard Drive).
    
    
16. Connect the coin-cell battery cable to the system board.
    
    
17. Replace the processor (see Replacing the Processor Module).
    
    
18. Replace the heatsink assembly (see Replacing the Processor Heatsink Assembly).
    
    
19. Replace the memory modules (see Replacing a Memory Module).
    
    
20. Replace the card in the WPAN/UWB/FCM card slot, if applicable (see Replacing a WPAN (UWB/BT) Card or Replacing an FCM).
    
    
21. Replace the card from the WLAN/WiMax card slot, if applicable (see Replacing the WLAN/WiMax Card).
    
    
22. Replace the card from the WWAN/FCM card slot, if applicable (see Replacing a WWAN Card or Replacing an FCM).
    
    
23. Replace the hinge covers (see Replacing the Hinge Covers).
    
    
24. Replace the bottom of the base assembly (see Replacing the Bottom of the Base Assembly).
    
    
25. Follow the procedures in After Working on Your Computer.
    
    

NOTE: If you use a BIOS update program disc to flash the BIOS, press <F12> before inserting the disc in order to set the computer to boot from the disc for one time only. Otherwise, you must enter the system setup program to change the default boot order.

26. Flash update the BIOS (see Flashing the BIOS for more information).
    
    
27. Enter the system setup program to update the BIOS on the new system board with the computer Service Tag. For information on the system setup program, see the Dell™ Technology Guide on your computer or at support.dell.com.
    
    

Back to Contents Page