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