HP Compaq d530 MT Hardware Reference Manual page 32

Hardware Upgrades
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2–14
7. If removing an expansion card from a standard expansion
socket, 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 an Expansion Card from a Standard Expansion Socket
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