HP ProOne 400 G1 All-in-One Hardware Reference Manual page 41

5. Set the top edge of the access panel down on the top edge of the computer chassis (1). Be sure
to align the hooks on the underside of the top edge of the access panel with the top edge of the
computer.
6. Rotate the bottom edge of the access panel down (2) and press it firmly onto the chassis until it
locks into place.
You will hear audible clicks as the latches click into place.
Figure 2-37 Replacing the access panel
7. Place the computer in the upright position.
8. Reconnect the power cord and external devices.
9. Lock any security devices that were disengaged when the access panel was removed.
10. Turn on the computer.
Replacing drives 35