User Guide - Windows 10

Component Description
(4)
Service door release lock Locks the service door.
(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 products only) Supports a wireless subscriber identity module (SIM). The
SIM slot is located inside the battery bay.
18 Chapter 2 Components