Bottom
NOTE: Your computer may look slightly different from the illustration in this section.
Item | Component | Description |
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(1) | Vents (2) | Enables 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 |
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| normal for the internal fan to cycle on and off during |
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| routine operation. |
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(2) | Service cover | Provides access to the hard drive bay, the WLAN module |
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| slot, the WWAN module slot, and the memory |
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| module slots. |
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| CAUTION: To prevent an unresponsive system, replace |
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| the wireless module only with a wireless module |
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| authorized for use in the computer by the governmental |
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| agency that regulates wireless devices in your country or |
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| region. If you replace the module and then receive a |
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| warning message, remove the module to restore |
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| computer functionality, and then contact support through |
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| Help and Support. |
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(3) | Battery lock latch | Releases the battery from the computer. |
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(4) | SIM slot | Supports a wireless subscriber identity module (SIM) |
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| (select models only). The SIM slot is located inside the |
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| battery bay. |
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(5) | Battery bay | Holds the battery. |
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16 | Chapter 2 External component identification |
