HP EliteDesk 800 G4 SFF Maintenance And Service Manual page 36

c. If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion
socket away from the card (1) and carefully rock the card back and forth until the connectors pull
free from the socket. Lift the card straight up (2) then away from the inside of the chassis (3) to
remove it. Be sure not to scrape the card against other components.
6. Store the removed card in anti-static packaging.
7. If you are not installing a new expansion card, install an expansion slot cover to close the open slot.
IMPORTANT:
cover for proper cooling of internal components during operation.
28 Chapter 4 Removal and replacement procedures
After removing an expansion card, you must replace it with a new card or expansion slot