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11. Remove the speaker assemblies from the bottom case.
12. Pull the right side of the bottom case, next to the audio 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 module on the replacement system board.
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 speaker assemblies
that came with the new system 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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