
Bottom
| Component | 
 | Description | 
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| (1) | Service door | Gives access to the hard drive, the wireless LAN | 
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 | module slot, the WWAN module slot (select models | 
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 | only), and the memory module slots. | 
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 | CAUTION: To prevent an unresponsive system, | 
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 | replace the wireless module only with a wireless | 
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 | module authorized for use in the computer by the | 
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 | governmental agency that regulates wireless devices | 
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 | in your country or region. If you replace the module | 
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 | and then receive a warning message, remove the | 
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 | module to restore computer functionality, and then | 
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 | contact support through HP Support Assistant. To | 
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 | access HP Support Assistant on the Start screen, | 
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 | select the HP Support Assistant app. | 
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| (2) | Vents (2) | Enable airflow to cool internal components. | 
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 | NOTE: The computer fan starts up automatically to | 
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 | cool internal components and prevent overheating. It | 
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 | is normal for the internal fan to cycle on and off during | 
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 | routine operation. | 
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| (3) | Near Field Communication (NFC) | Allows you to connect wirelessly with, communicate | 
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 | sensor | with, and transfer data/info to and from your Near | 
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 | Field Communication  | 
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| (4) | Battery bay | Holds the battery. | 
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| (5) | Battery bay cover release latch | Releases the battery cover from the battery bay. | 
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| ENWW | Bottom 13 | 
