Using The Usb Security Cover - HP RP7 Model 7800 Hardware Reference Manual

19. Slide the mounting bracket cover down over the stand's mounting bracket.
20. Plug in the power cord and press the power button.

Using the USB Security Cover

1. Turn off the computer properly through the operating system, then turn off any external devices.
2. Disconnect the power cord from the power outlet.
CAUTION:
as 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.
3. Slide down the two levers on the upper corners of the rear I/O panel (1) and rotate the cover off
(2).
Regardless of the power-on state, voltage is always present on the system board
Using the USB Security Cover 57