HP ProOne 400 G1 All-in-One Hardware Reference Manual page 37

12. To insert the new battery, slide one edge of the replacement battery under the holder's lip with
the positive side up (1) and press the other edge down into the holder so that it snaps in place
(2).
Figure 3-24 Removing and Replacing a Coin Cell Battery (Type 1)
13. Engage the three tabs 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.
14. Fasten the two screws to secure the fire enclosure shield to the chassis.
15. Place the VESA panel onto the chassis and fasten the three screws to secure the VESA panel to
the chassis.
16. 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.
17. Rotate the bottom edge of the access panel down (2) and press it firmly onto the chassis until it
locks into place.
18. Tighten the captive screws (3) to secure the access panel in place.
Figure 3-25 Replacing the access panel
19. Place the computer in the upright position.
20. Reconnect the power cord and external devices.
21. Lock any security devices that were disengaged when the access panel was removed.
Replacing the battery 31