HP Compaq 325 Maintenance And Service Manual page 28

Component
(1) Battery release latches (2)
(2) Battery bay
(3) Vents (3)
(4) Memory module compartment
WLAN module compartment
Hard drive bay
20 Chapter 2 External component identification
Description
Release the battery from the battery bay.
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.
Contains the memory module slots.
Contains the wireless LAN module slot.
CAUTION: To prevent an unresponsive system and the display
of a warning message, replace the WLAN module with only a
module authorized for use in the computer by the governmental
agency that regulates wireless devices in your country. If you
replace the module and then receive a warning message, remove
the module to restore computer functionality, and then contact
technical support through Help and Support.
Holds the hard drive.