Dell Inspiron 4100 - Manual (Page 39)

10. Turn the computer over and remove the M2.5 x 5-mm screw, which is labeled "circle B" with an arrow on the front center of the system board by the
battery connector.
1 fan guard
2 M2.5 x 5-mm screws (9)
battery connector.
11. Remove the speakers from the bottom case.
12. Pull the right side of the bottom case, next to the external headphone and microphone connectors, away from the system board as you simultaneously
lift the front of the system board out and away from the bottom case.
Replacing the System Board
1. Install the microprocessor on the replacement system board.
2. Connect the right and left speakers to the replacement system board.
3. 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.
4. Replace the modem, the speaker assemblies, and the microprocessor thermal cooling assembly that you removed from the old system board.
1 M2.5 x. 5-mm screw (1)
HINT: Be sure to route cables so that they will not be crimped or pinched when the complete assembly is put back together.