HP ProBook 4740s Notebook-PC - Manual (Page 29)

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Component Description
(1) Battery and service door release
latches ● Releases the battery from the battery bay by
sliding the release latches one time.
● When the battery has been removed from the
battery bay, releases the service door from
the computer by sliding the release latches a
second time.
(2) Battery bay Contains the battery.
(3) Service door Protects the hard drive bay, 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 technical support
through Help and Support.
(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.
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