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2 External component identification
Display
Component Description
(1) Speakers (2) Produce sound.
(2) Internal display switch Turns off the display or initiates Sleep if the display is closed
while the power is on.
NOTE: The display switch is not visible from the outside of the
computer.
(3) WWAN antennas (2)* (select models only) Send and receive wireless signals to communicate with wireless
wide-area networks (WWAN).
(4) WLAN antennas (2)* Send and receive wireless signals to communicate with wireless
local area networks (WLAN).
(5) Internal microphone(s) (1 or 2 depending on
model)
Record sound.
(6) Webcam light (select models only) On: The webcam is in use.
8 Chapter 2 External component identification