HP Compaq NC6220 Hardware And Software Manual page 126

c. Press the module downward until the retention clips snap
12. Replace the keyboard and slide the keyboard latches up to
lock them.
13. Replace the keyboard access screws located on the bottom of
the notebook.
14. Replace the battery packs.
15. Reconnect external power and external devices.
16. Restart the notebook.
Hardware and Software Guide
into place.
Memory Modules
8–10