HP EliteOne 800 G2 Hardware Reference Manual page 52

18. If your computer model is a ProOne 400, screw in 4 screws to secure the EMI shield to the chassis.
19. To replace the access panel, align the latches with the slots in the rear port compartment. Set the
access panel down (1) and press in the tabs around all sides of the panel until it is in place.
20. Push the latches toward the sides of the computer to lock the access panel in place (2).
44 Chapter 3 Hardware repair and upgrade