Compaq dc7800 - Convertible Minitower PC Hardware Reference Manual page 27

6. Locate the correct vacant expansion socket on the system board and the corresponding expansion
slot on the back of the computer chassis.
7. Press straight down on the two green thumb tabs inside the chassis (1) and rotate the expansion
card retention latch up (2).
Figure 2-10
8. Before installing an expansion card, remove the expansion slot cover or the existing expansion
card.
NOTE:
to the expansion card.
a. If you are installing an expansion card in a vacant socket, remove the appropriate expansion
slot cover on the back of the chassis. Lift the expansion slot cover from the expansion slot.
Figure 2-11
ENWW
Opening the Expansion Slot Retainer
Before removing an installed expansion card, disconnect any cables that may be attached
Removing an Expansion Slot Cover
Removing or Installing an Expansion Card 21