User Guide
Bottom
NOTE: Refer to the illustration that most closely matches your computer.
Component Description
(1) Service doors (2) Provide access to the hard drive bay, the WLAN module 
slot, the WWAN module slot, the SIM card 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.
▲ Type support in the taskbar search box, and then 
select the HP Support Assistant app.
– or –
Click the question mark icon in the taskbar.
(2) SIM card slot (select products only) Supports a wireless subscriber identity module (SIM) card. 
The SIM card slot is located under the service door.
(3)   Vents (1 or 2 depending on model) Enable airow 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 o during routine 
operation.
16 Chapter 2 Components










