System Board: Dell Latitude C840 Service Manual
2 system board
3 network connector
4 modem connector
5 network cable cover
6 M2.5 x 20-mm screw
The BIOS chip on the system board 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 floppy disk or CD that provides a utility for
transferring the service tag sequence to the replacement system board.
NOTICE:
If you received a flash BIOS update floppy disk or CD with the replacement
microprocessor, you must update the BIOS after replacing the microprocessor module.
Removing the System Board
1. Follow the instructions in "
Preparing to Work Inside the Computer
."
2. Remove the
.
3. Remove any installed
.
4. If migrating the memory, remove all installed
5. Remove (if migrating) or disconnect the
6. Remove the
7. Remove the
8. Remove the
.
9. Remove the
.
10. Remove the
11. Remove the
microprocessor thermal-cooling assembly
.
12. If migrating the microprocessor, remove the
13. Separate the network cable from the system board:
a. First remove the network cable cover: Insert a narrow plastic scribe or small screwdriver
just barely into the slot that faces the back of the computer (do not insert the scribe far
enough to catch on the wires inside), press down on the cover lightly to secure it, and
pry upward to release the cover.
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