HP Pavilion dm1-4171nr Entertainment Notebook PC - Manual (Page 23)

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Component Description
(1) Battery bay Holds the battery.
(2) SIM slot (select models only) Supports a wireless subscriber identity module (SIM) (select
models only). The SIM slot is located inside the battery bay.
(3) Battery/service door latch Releases the battery from the battery bay and the service
door from the computer.
(4) Vent Enables 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) Service door Provides access to the hard drive bay, the memory module
slot, the wireless local area network (WLAN) module, and
the WWAN module (select models only).
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