Dell OptiPlex GX100 - Manual (Page 18)

System Board
Figure 29. System Board Removal
To remove the system board, perform the following steps:
1. Disconnect all cables from their connectors at the back of the computer.
2. Remove the expansion-card cage.
3. Disconnect all cables from the system board.
4. Remove the screw that secures the system board to the bottom of the chassis.
5. Slide the system board toward the front of the chassis until it stops.
6. Carefully lift the system board out of the chassis (be sure to lift evenly and not twist the system board).
To replace the system board, perform the following steps:
1. Remove the DIMMs and the microprocessor/heat sink assembly, and install them on the replacement board.
2. Set the jumpers on the new system board so that they are identical to those on the old board, unless you are installing a microprocessor
upgrade.
3. Push down near each slot to engage the grounding clip onto its corresponding tab.
4. Push evenly on both sides of the system board as you slide and lock it into position (do not twist the system board).
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