Removing Or Installing An Expansion Card - HP ProDesk 400 G3 MT Hardware Reference Manual

Removing or installing an expansion card

The computer has three PCI Express x1 expansion sockets and one PCI Express x16 expansion socket.
NOTE: You can install a PCI Express x1, x8, or x16 expansion card in the PCI Express x16 socket.
For dual graphics card configurations, the first (primary) card must be installed in the PCI Express x16 socket.
To remove, replace, or add an expansion card:
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as compact discs or USB flash drives, from the computer.
3. Turn off the computer properly through the operating system, then turn off any external devices.
4. Disconnect the power cord from the power outlet and disconnect any external devices.
CAUTION:
the system is plugged into an active AC outlet. You must disconnect the power cord to avoid damage to
the internal components of the computer.
5. Remove the computer access panel.
6. Remove the screw that holds down the expansion card retention latch (1), and then slide the latch up (2)
and pull it off the rear of the chassis (3).
7. Locate the correct vacant expansion socket on the system board and the corresponding expansion slot
on the back of the computer chassis.
8. Before installing an expansion card, remove the expansion slot cover or the existing expansion card.
NOTE:
the expansion card.
a. If you are installing an expansion card in a vacant socket, you must slide one of the expansion slot
covers up and out of the chassis or use a flatblade screwdriver to pry out one of the metal shields
on the rear panel that covers the expansion slot. Be sure to remove the appropriate shield for the
expansion card you are installing.
14 Chapter 2 Hardware upgrades
Regardless of the power-on state, voltage is always present on the system board as long as
Before removing an installed expansion card, disconnect any cables that may be attached to