HP ProOne 400 G1 All-in-One Hardware Reference Manual page 33

11. To insert the new battery, slide one edge of the replacement battery under the holder's lip with
the positive side up. Push the other edge down until the clamp snaps over the other edge of the
battery (2).
Figure 2-24 Removing and replacing a coin cell battery
12. Engage the four hooks on the right edge of the fire enclosure shield with the matching slots on
the right side of the chassis and rotate the fire enclosure shield down onto the chassis.
13. Fasten the three screws to secure the fire enclosure shield to the chassis.
14. Place the VESA panel onto the chassis and fasten the three screws to secure the VESA panel to
the chassis.
15. 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.
16. 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 2-25 Replacing the access panel
Replacing the battery 27