Hardware Reference Guide

Installing the access panel
1. Place the access panel on the computer and slide it back (1).
2. When the access panel slides into place, tighten the thumbscrew (2) to secure the access panel in place
as shown in the following image.
NOTE: Your computer model may look slightly dierent from the illustration in this section.
Removing and installing the access panel of the HP EliteDesk
800 35W
NOTE: For models other than the HP EliteDesk 800 35W, see Removing and installing the access panel
on page 10.
Removing the access panel of the HP EliteDesk 800 35W
To access internal components, you must remove the access panel and the discrete graphics processing unit
(DGPU):
1. Remove/disengage any security devices that prohibit opening the computer.
2. Remove all removable media, such as a USB ash drive, from the computer.
3. Turn o the computer properly through the operating system, then turn o any external devices.
4. Disconnect the power cord from the AC outlet and disconnect any external devices.
CAUTION: Regardless of the power-on state, voltage is always present on the system board 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.
5. If the computer is on a stand, remove the computer from the stand. Then position the computer right-
side up on a stable surface.
6. Loosen the thumbscrew (1) on the rear panel as shown in the following image.
NOTE: If necessary, a Torx T-15 screwdriver may be used to loosen the thumbscrew.
Removing and installing the access panel of the HP EliteDesk 800 35W 11