Dell Latitude C640 Service Manual download pdf (Page 63)

System Board: Dell Latitude C540/C640 Service Manual

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System Board

Dell™ Latitude™ C540/C640 Service Manual

Removing the System Board

The system board's BIOS chip contains the service tag sequence, which is also visible

on a bar code label on the bottom of the computer. The replacement kit for the

system board includes a CD that provides a utility for transferring the service tag

sequence to the replacement system board.

NOTICE: Disconnect the computer and any attached devices from electrical

outlets, and remove any installed batteries.

NOTICE: To avoid ESD, ground yourself by using a wrist grounding strap or by

touching an unpainted metal surface on the computer.

NOTICE: Read "Preparing to Work Inside the Computer" before performing the

following procedure.

1. Remove the

hard drive.

2. Remove the

keyboard.

3. Remove the

display assembly.

4. Remove the

palm rest.

5. Remove the

microprocessor thermal cooling assembly.

6. Remove the

microprocessor module.

7. Remove the

modem, memory modules, and Mini PCI card.

8. From the bottom of the computer, remove the six M2.5 x 5-mm screws labeled

"circle B" that secure the system board to the bottom case.

9. Remove the three M2.5 x 5-mm screws labeled "circle B" that secure the fan

guard to the bottom case.

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Dell Latitude C640 Service Manual Page 63