Installing The System Board - Dell Precision Tower 3420 Owner's Manual

4. To remove the system board:
a. Remove the screws that secure the system board to the computer [1].
b. Slide the system board toward the front of the computer and lift it from the computer [2].

Installing the system board

1. Hold the system board by its edges and angle it toward the back of the computer.
2. Lower the system board into the computer until the connectors at the back of the system board
align with the slots on the back wall of the computer, and the screw holes on the system board align
with the standoffs on the computer.
3. Tighten the screws that secure the system board to the computer
4. Connect the cables to the system board.
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