Dell OptiPlex 360 (Late 2008) - Manual (Page 120)

120 System Board
9 Disconnect the fan power cables from the system board.
10 Disconnect any additional cables from the system board.
11 Remove the 11 screws securing the system board to the computer chassis.
WARNING: The system board is fragile. Handle it carefully.
12 Lift the system board out of the computer chassis and place it into static-
protective packaging.
Replacing the System Board
NOTE: This procedure assumes that you have completed the removal procedure
first.
1 Remove the system board from its packaging and place it in position inside
the computer chassis.
2 Align the 11 screw holes on the system board with the screw holes in the
chassis, and ensure the back panel connectors are properly aligned in the
openings on the back of the chassis.
3 Replace the 11 screws securing the system board to the computer chassis.
Avoid over-tightening the screws.
1 system board 2 screws (11)
1
2