Vizio E420-B1 - TV Controls and Connections; Rear Panel Connections

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ReaR Panel
Controls and Connections
REAR PANEL
Coaxial - Connect coaxial cable from cable, satellite, or antenna.
Optical Audio Out - Connect an optical/SPDIF audio device, such as
a home audio receiver.
Stereo Audio Out - Connect an RCA audio device, such as sound bar.
HDMI - Connect an HDMI device.
Component/Composite - Connect a component or composite device.
USB - Connect a USB thumb drive to display photos.
HDMI - Connect an HDMI device.