HP Pro 3000 MT Hardware Reference Manual page 16

NOTE:
to the expansion card.
a.
b.
10 Hardware Upgrades
Before removing an installed expansion card, disconnect any cables that may be attached
If you are installing an expansion card in a vacant socket, you must use a flatblade screwdriver
to pry out the metal shield on the rear panel that covers the expansion slot. Be sure to remove
the appropriate shield for the expansion card you are installing.
Figure 8 Removing an Expansion Slot Cover
If you are removing a standard PCI card or 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 then away from the inside of the chassis to release
it from the chassis frame. Be sure not to scrape the card against the other components.
Figure 9 Removing a PCI or PCI Express x1 Expansion Card