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30 Dell Latitude L400 Service Manual
NOTICE: To avoid damaging the system board, you must remove the
main battery before you service the computer.
NOTICE: The processor is not replaceable. Do not attempt to remove
the thermal cooling solution.
1. Remove the keyboard bezel.
2. Remove the display assembly.
3. Remove the keyboard.
4. Remove the palmrest assembly.
5. Use a 5-mm socket wrench to remove the four 5-mm socket screws for the
VGA and parallel ports located on the back of the bottom case assembly.
6. Use a small flat-blade screwdriver to remove the two IDE connector
screws at both ends of the IDE (modular bay) connector located on the
back of the bottom case assembly.
NOTICE: To ensure maximum cooling for the microprocessor, do not
touch the glue side of the thermal conductive tape. The oils in your
skin reduce the heat transfer capability on the glue side of the tape.
7. Peel up the EMI adhesive sponge that connects the audio EMI shield to
the thermal cooling solution (see Figure 22).
You only need to peel up the part of the sponge that lays on the thermal
cooling solution. The end of the sponge that lays on the audio EMI shield
can remain.
NOTICE: The audio EMI shield is attached to the USB connector
housing with two-sided tape. To avoid bending the audio EMI shield,
care must be taken when separating the audio EMI shield from the
USB connector housing.
8. Using a small flat-blade screwdriver, carefully separate the audio EMI
shield away from the USB connector housing.
Place the edge of the screwdriver between the audio EMI shield and the
USB connector housing, and slowly pry the two apart.
9. Remove the two M2 x 4-mm screws that secure the audio I/O cover to the
bottom case assembly.
10. Remove the audio I/O cover.
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.