HP dx7500 - Microtower PC Service & Reference Manual page 66

4. On the rear of the computer, a slot cover lock secures the expansion card brackets in place.
Remove the screw from the slot cover lock then slide the slot cover lock up to remove it from the
chassis.
Figure 7-8
5. 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, 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 7-9
56 Chapter 7 Removal and Replacement Procedures Microtower (MT) Chassis
Opening the Slot Cover Lock
Before removing an installed expansion card, disconnect any cables that may be attached
Removing an Expansion Slot Cover