Dell Inspiron 500m - Manual (Page 33)

8. Remove the four M2 x 3-mm screws labeled "circle B" that secure the system board to the computer base.
9. Pull out the system board starting from the front of the computer.
Installing the System Board
1. Follow all of the steps in " Removing the System Board " in reverse order.
2. Turn on the computer.
3. Insert the floppy disk or CD that accompanied the replacement system board into the appropriate drive. Follow the instructions that appear on the
screen.
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1 M2 x 3-mm screws (4)
NOTICE: Before turning on the computer, replace all screws and ensure that no stray screws remain inside the computer. Failure to do so may result in
damage to the computer.
NOTE: After replacing the system board, enter the computer Service Tag into the BIOS of the replacement system board.