HP EliteDesk 800 Hardware Reference Manual page 77

9. Before installing an expansion card, remove the expansion slot cover or the existing expansion
card.
NOTE:
attached to the expansion card.
a. If you are installing an expansion card in a vacant socket, remove the appropriate
expansion slot cover on the back of the chassis. Pull the slot cover straight up then away
from the inside of the chassis.
b. If you are removing a PCI Express x1 card, hold the card at each end, and carefully rock it
back and forth until the connectors pull free from the socket. Pull the expansion card
straight up from the socket (1) then away from the inside of the chassis to release it from
the chassis frame (2). Be sure not to scrape the card against the other components.
ENWW
Before removing an installed expansion card, disconnect any cables that may be
Removing or installing an expansion card 69