12. Slide the system board up to disconnect it from the I/O board
Attention:  Take great care not to bend the connector between the system
board and the I/O board.
System
Board
I/O Board
13. Carefully remove the system board from the system unit.
Replacement of System Board
To replace the system board, perform the removal steps in the reverse order.
Carefully connect the system board and I/O board. Hold the system board in place
while inserting holding screws.
7-32 Service Guide