HP Computer User Manual page 23

Component
(5) Service door release latch locked
position
(6) Optional security screw
(7) Service door release latch
(8) Battery bay
(9) Vents (4)
Description
Holds the service door.
Locks the service door release latch in place.
Releases the service door on the computer.
Holds the battery.
Enable airflow to cool internal components.
NOTE: The computer fan starts up automatically to
cool internal components and prevent overheating. It
is normal for the internal fan to cycle on and off during
routine operation.
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