A SERVICE OF

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