Dell 100-Mbps manual System Board, Remove the system board as follows

System Board

screw

slot (7)

Figure 4-26. System Board Removal

To remove the system board, follow these steps:

1.Disconnect all cables from their connectors at the back of the system unit.

2.Remove the expansion-card cage.

3.Remove the microprocessor fan.

4.Disconnect all cables from the system board.

Remove the hard-disk drive power cable(s). Slide any drives in the

5.25-inch bays toward the front of the system unit, but leave them cabled.

5.Remove the system board as follows:

a.Remove the screw that secures the system board to the bottom of the system unit.

b.Slide the system board toward the front of the system unit approxi- mately one-half inch to release the board from the seven slots in the floor of the system unit.

c.Lift the system board out of the system unit.

If you are replacing a system board, remove the DIMMs, the microprocessor, the terminator or add-in card, and the expansion-card cage from the old system board and install them on the replacement board.

4-26 Dell OptiPlex GXpro Systems Service Manual