HP Pavilion dm1-4211nr Entertainment Notebook PC - Manual (Page 20)

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Component Description
(1) Battery bay Contains the battery.
(2) Battery/service door latch Releases the battery from the battery bay and the service
door from the computer.
(3) 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.
(4) Service door Provides access to the hard drive bay, a memory module
slot, and the wireless local area network (WLAN) module.
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 support.
10 Chapter 2 Getting to know your computer