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