4 Lift the I/O board, along with the cable, o the palm rest and keyboard assembly.
Procedure for computers shipped without optical drive
1 Disconnect the coin-cell battery cable from the I/O board.
2 Open the latch and disconnect the I/O-board cable from the system board.
3 Remove the two screws (M2x4) that secure the I/O board to the palm rest and
keyboard assembly.
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