2 External component identification
Display
Item | Component | Description |
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(1) | Internal display switch | Turns off the display and initiates Sleep if the display is |
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| closed while the power is on. |
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| NOTE: The internal display switch is not visible from |
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| the outside of the computer. |
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(2) | WLAN antennas (2)* | Send and receive wireless signals. |
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(3) | Proximity sensors (2)* | Detect your presence in front of the computer and turn on |
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| the radiance backlight keyboard feature. |
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(4) | Internal microphones (2) | Record audio, automatically reducing ambient noise and |
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| providing echo cancellation. |
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(5) | Webcam light | On: The webcam is active. |
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4 | Chapter 2 External component identification |