HP HDX 16 - Manual (Page 19)

External component identification 2–9
Bottom components
Item Component Function
1 Subwoofer Contains the subwoofer speaker.
2 Battery bay Holds the battery.
3 Battery release latch Releases the battery from the battery bay.
4 Vents (7) Enable airflow to cool internal components.
✎
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.
5 Hard drive bay Holds the hard drive, the TV tuner card(select models only), and the
2 memory module slots.
6 WLAN module compartment Holds the WLAN module.
Ä 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.