HP ProOne 400 G1 All-in-One Hardware Reference Manual page 20

7. Rotate the bottom edge of the access panel up (2), and then lift the access panel off of the
computer (3).
Figure 2-7
8. Place the access panel down on a flat surface with the inside of the panel facing up.
9. Remove the four screws securing the stand to the access panel.
Figure 2-8
NOTE:
10. 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.
14 Chapter 2 Hardware repair and upgrade
Removing the access panel
Removing the stand
Save the screws together with the stand in case they are needed in the future.