2–10
Maintenance and Service Guide
External component identification
Bottom components
Item
Component
Description
(1)
Battery bay
Holds the battery.
(2)
SIM slot (select models only)
Contains a wireless subscriber identity module (SIM). The SIM slot is located
inside the battery bay.
(3)
Vents (6)
Enable airflow to cool internal components.
✎
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.
(4)
Hard drive bay
Holds the hard drive and contains the memory module slot.
(5)
Battery release latch
Releases the battery from the battery bay.