HP d538 - Convertible Minitower Desktop PC Hardware Reference Manual page 31

8. If removing an AGP card from an AGP expansion socket with a retention
mechansim, pull the retention arm away from the socket then carefully rock the
card 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.
Removing an AGP Card from a Socket with a Retention Mechansim
9. Store the 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: After removing an expansion card, you must replace it with a new card or
cover the open slot (for example, with a metal slot cover or a piece of duct tape) for proper
cooling of internal components during operation.
Hardware Reference Guide
Hardware Upgrades
2-15