Dell OptiPlex E1 Service Manual page 60

4-14 Dell OptiPlex E1 Managed PC Service Manual
riser-board mounting
screws (2)
riser board
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To remove the riser board, follow these steps:
When you replace the riser board, be sure that the alignment feature on the
expansion-card cage engages with the alignment slot.
riser-board
alignment slot
expansion-card cage