Bottom components
Item Component Function
(1) Speaker Produces computer sound.
(2) Memory module/WLAN module compartment Contains a memory module slot and a WLAN 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, and
then contact technical support through Help and Support.
(3) Hard drive bay Holds the hard drive.
(4) Vents (6) 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) Battery release latches (2) Release the battery from the battery bay.
(6) Battery bay Holds the battery.
(7) SIM slot Contains a subscriber identity module (SIM). The SIM slot is
located inside the battery bay.
(8) WWAN module compartment Contains a WWAN 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, and
then contact technical support through Help and Support.
16 Chapter 2 External component identification