HP Compaq dc7100 MT Hardware Reference Manual page 34

Hardware Upgrades
✎
2–18
b. If you are removing a standard PCI card, hold the card at each
end and carefully rock it back and forth until the connectors
pull free from the socket. Lift the card straight up to remove
it. Be sure not to scrape the card against other components.
Before removing an installed expansion card, disconnect any cables
that may be attached to the expansion card.
Removing a Standard PCI Expansion Card
www.hp.com Hardware Reference Guide