HP Compaq dx7300 MT Hardware Reference Manual page 27

5. Remove the computer access panel.
CAUTION
right of the DIMM sockets. If the LED is illuminated, the system still has power. Turn off the
computer and remove the power cord before proceeding.
6. Locate the correct vacant expansion socket on the system board and the corresponding expansion
slot on the back of the computer chassis.
7. On the rear of the computer, a sliding slot cover lock secures the expansion card brackets and
expansion slot covers in place. Remove the thumbscrew that holds the slot cover lock in place (1)
and slide the slot cover lock away from the brackets (2) so that they are no longer secured by the
lock.
Figure 2-9
8. Before installing an expansion card, remove the expansion slot cover or the existing expansion
card.
ENWW
After removing the access panel, look for the LED on the system board to the
Releasing the Slot Cover Lock
Removing or Installing an Expansion Card 21