Removing Or Installing An Expansion Card - HP ProDesk 400 G4 SFF Hardware Reference Manual

Removing or installing an expansion card

The computer has one PCI Express x1 expansion socket and one PCI Express x16 expansion socket.
NOTE: The PCI Express sockets support only low profile cards.
You can install a PCI Express x1, x4, 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. See
6. Locate the correct vacant expansion socket on the system board and the corresponding expansion slot
cover on the back of the computer chassis.
7. Rotate the slot cover release latch to the open position.
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 PCI Express x1 socket, insert a flat-bladed
screwdriver into the slots on the rear of expansion slot cover (1) and rock the slot cover back and
forth to break it free from the chassis (2).
18 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
Removing the computer access panel on page 5.