Compaq Prolinea Family Maintenance & Serice Manual page 118

3. Disconnect any cables connected to the expansion card.
NOTE: If removing an expansion card from one of the lower slots, it
might be necessary to remove the upper expansion card(s) to have
sufficient access for cable removal.
NOTE: If removing a full length expansion card from a CDS model, the
speaker will have to be removed from the front panel of the
chassis to provide adequate clearance.
4. Remove the screw securing the expansion card bracket to the rear of the
computer (Figure 5-38) and slide the option card out of its connector
on the backplane board.
5. If an expansion card is removed and not replaced, fill the opening in
the rear panel with a slot cover as shown in Figure 5-39.
See Section 5.9.