
Bottom components
Component | Description  | |
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(1)  | Hard drive bay  | Holds the hard drive.  | 
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(2)  | Vents (5)  | Enable airflow to cool internal components.  | 
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  | NOTE: The computer fan starts up automatically to cool internal  | 
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  | components and prevent overheating. It is normal for the internal  | 
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  | fan to cycle on and off during routine operation.  | 
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(3)  | Memory module compartment  | Contains the memory module slots.  | 
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(4)  | Battery release latch  | Releases the battery from the battery bay.  | 
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(5)  | Battery bay  | Holds the battery.  | 
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(6)  | Wireless module compartment  | Holds a wireless LAN module.  | 
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  | NOTE: To prevent an unresponsive system, replace the wireless  | 
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  | module only with a wireless module authorized for use in the  | 
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  | computer by the governmental agency that regulates wireless  | 
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  | devices in your country or region. If you replace the module and  | 
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  | then receive a warning message, remove the module to restore  | 
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  | computer functionality, and then contact technical support through  | 
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  | Help and Support.  | 
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(7)  | Bluetooth compartment  | Contains a Bluetooth device.  | 
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12 Chapter 2 External component identification