HP Rp5700 - Point of Sale System Hardware Reference Manual page 26

To install an ADD2/SDVO card or a PCI Express card:
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as compact discs, 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:
long as 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. If the computer is on a stand, remove the computer from the stand.
6. Remove the computer cover.
7. Open the slot cover retainer that secures the slot covers.
Figure 2-12
20 Chapter 2 Hardware Upgrades
Regardless of the power-on state, voltage is always present on the system board as
Opening the Expansion Slot Retainer
ENWW