HP EliteBook 8440p - Manual (Page 119)

14. Slide the 4 keyboard release latches to lock the keyboard (2).
15. Close the cover.
16. Turn the computer upside down on a flat surface.
17. Replace the 3 keyboard access screws.
18. Replace the battery.
19. Turn the computer right-side up, and then reconnect external power and external devices.
20. Turn on the computer.
Upgrading a memory module in the primary memory module slot 107