HP ProBook 655 G1 Notebook PC - Manual (Page 23)

Component Description
(5) 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.
(6) SIM slot (select models only) Supports a wireless subscriber identity module (SIM).
The SIM slot is located inside the battery bay.
Component Description
(1) Service door Provides access to the hard drive bay, the
wireless LAN (WLAN) module slot, the
WWAN 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 HP Support Assistant. To access
HP Support Assistant on the Start screen,
select the HP Support Assistant app.
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