HP 345561-001 Startup And Reference Manual page 123

8. Align the tabs on the memory compartment cover with the
cover slots on the notebook, then tilt the cover downward
until it is seated 1.
9. Reinsert and tighten the memory compartment screw 2.
10. Replace the battery pack (if you removed a battery pack at the
beginning of this procedure), reconnect the notebook to
external power, then restart the notebook.
Closing the memory compartment
Startup and Reference Guide—Part 2
Hardware Options and Upgrades
8–15