HP Pro 3000 SFF Hardware Reference Manual page 18

c.
9. Store the removed card in anti-static packaging.
10. If you are not installing a new expansion card, install an expansion slot cover to close the open
slot.
CAUTION:
slot cover for proper cooling of internal components during operation.
12 Hardware Upgrades
If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion
socket away from the card and carefully rock the card back and forth until the connectors pull
free from the socket. Be sure not to scrape the card against the other components.
Figure 12 Removing a PCI Express x16 Expansion Card
After removing an expansion card, you must replace it with a new card or expansion