Dell OptiPlex NX1 - Manual (Page 153)

Removing and Replacing Parts on the OptiPlex NX1 Net PC Chassis 7-11
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To remove the riser board, follow these steps:
1. Remove the expansion-card cage.
2. Remove the expansion card if one is installed.
3. Lay the expansion-card cage on a flat work surface, with the riser board
facing up.
4. Remove the riser-board mounting screw.
5. Slide the riser board to the side as shown in Figure 7-10, and then remove
the riser board from the expansion-card cage.
When you replace the riser board, be sure that the two tabs on the expansion-
card cage engage the riser board slots.
riser board
riser-board
mounting screw
expansion-card
cage
tabs (2)
slots (2)