Vizio E420i-A0 - Controls and Connections; Physical Interface Overview

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Controls and Connections
Ethernet - Connect Ethernet cable from home network.
Coaxial - Connect coaxial cable from cable, satellite, or antenna.
Optical Audio Out - Connect optical/SPDIF audio device, such as
home audio receiver.
Stereo Audio Out - Connect RCA audio device, such as sound bar.
HDMI - Connect HDMI device.
Component/Composite - Connect component or composite device.
USB - Connect USB thumb drive to play photo, music, or video.
HDMI - Connect HDMI device.
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