HP G72-b50US Notebook PC - Manual (Page 18)

Bottom components
Component Description
(1) Battery bay Holds the battery.
(2) Vents (4) 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.
(3) Battery release latch Releases the battery from the battery bay.
(4) Hard drive bay Holds the hard drive.
(5) Memory module compartment Holds two memory modules, the wireless local area network
(WLAN) module, and the RTC battery.
CAUTION: To prevent an unresponsive system, replace the
wireless module only with a wireless module authorized for use in
the computer by the governmental agency that regulates wireless
devices in your country or region. 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.
8 Chapter 1 Features