Dell Latitude C540 Service Manual page 66

System Board: Dell Latitude C540/C640 Service Manual
2. Install the replacement system board:
a. Insert the external microphone and headphone connectors through the
bottom case.
b. Replace the six M2.5 x 5-mm screws, starting on the right side of the
bottom case.
c. Replace the fan guard, inserting the tab into the bottom case, and replace
the three M2.5 x 5-mm screws. Replacing the screw opposite the tab first
makes it easier to insert and replace the other two screws.
3. Replace the modem and the microprocessor thermal cooling assembly that you
removed from the old system board.
NOTE: Route cables so that they will not be crimped or pinched when the
complete assembly is put back together.
4. Install the right and left
board in the bottom case.
5. Replace the palm rest, the keyboard, the display assembly, and the hard drive.
6. Replace the module bay devices and any PC Cards or plastic blanks in the PC
Card slot.
7. Insert the flash BIOS update floppy disk or CD that accompanied the
replacement system board, and turn on the computer. Follow the instructions on
the screen.
NOTE: After replacing the system board, enter the computer service tag
sequence into the BIOS of the replacement system board.
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speaker assemblies that came with the new system