HP ProBook 430 G1 Notebook PC - Manual (Page 22)

Bottom
Component Description
(1) Battery release latches (2) Releases the battery.
(2) Battery bay Holds the battery.
(3) Vent 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.
(4) Service door Provides access to the wireless LAN (WLAN) module
slot, the WWAN module slot, the SIM 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 HP Support Assistant. To
access HP Support Assistant from the Start screen,
select the HP Support Assistant app.
(5) SIM slot Supports a wireless subscriber identity module (SIM).
The SIM slot is located inside the service door.
12 Chapter 2 Getting to know your computer