Compaq dx2390 - Microtower PC Service & Reference Manual page 46

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. Be sure not to scrape the card against
the other components.
c. If you are removing a PCI Express x16 card, pull the retention arm on the back of the expansion
socket away from the card and carefully rock the card back and forth until the connectors pull
free from the socket. Be sure not to scrape the card against the other components.
6. Store the removed card in anti-static packaging.
7. If you are not installing a new expansion card, install an expansion slot cover to close the open
slot.
CAUTION:
slot cover for proper cooling of internal components during operation.
40 Chapter 6 Removal and Replacement Procedures Microtower (MT) Chassis
After removing an expansion card, you must replace it with a new card or expansion