Bottom - HP Pavilion dm1-4000 Getting Started Manual

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14 Chapter 2 Getting to know your computer
Battery bay
SIM slot (select models only)
Battery/service door latch
Vent
Service door
Description
Holds the battery.
Supports a wireless subscriber identity module (SIM). The
SIM slot is located inside the battery bay. For more
information, refer to the HP Notebook Reference Guide.
Releases the battery from the battery bay and the service
door from the computer.
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.
Provides access to the hard drive bay, a memory module
slot, the subscriber identity module (SIM) slot (select
models only), and the wireless local area network (WLAN)
module.