HP Pavilion 14 Maintenance And Service Manual page 28

Component
(4)
(5)
18 Chapter 2 External component identification
Vents (8)
Service door
Description
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.
Provides access to the wireless LAN (WLAN) module slot and the
memory module slots.
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 support through Help
and Support. From the Start screen, type h, and then select Help
and Support.