It is possible to link up just about any kind of audio/video device. This includes two television systems. Hooking up two TVs allows you to view the same programming, without have two different cable receivers or antennas. The link process only requires an RCA audio/video cable, which is available at your local electronics store for just a few dollars.
Insert one end of the RCA audio/video cables into the red, white and yellow "Video Out" ports on the first television.
Connect the opposite end of the cables into the "Video In" ports on the second television. Make sure the color of the audio/video cables match the same color of the connection ports.
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Power on the two different televisions, then select "Video" as the input option on the second television. The audio/video feed from the first television now loads onto the second monitor.