HP ProBook 4230s Notebook PC - Manual (Page 21)

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Component Description
(1) Battery and access cover release
latches Release the battery from the battery bay, and
releases the access cover from the computer.
(2) Battery bay Holds the battery.
(3) SIM slot Contains a wireless subscriber identity module (SIM)
(select models only). The SIM slot is located inside
the battery bay.
(4) Vents (2) 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.
(5) Hard drive bay Contains the hard drive, the wireless LAN module
slot, and the memory module slot.
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.
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