On all tv's there should be independent input for all devices. Xbox 360 ,Wii, and tv. Take a look at input at the back of tv. The Xbox input should coincide audio/video. The same with each device. Then you use the tv's remote to select the input for each device. They should all work independently from each other. Such as component 1 for Xbox, component 2 for Wii, and depending on what type of tv input you use, such as coaxial, RCA, you note and put tv input setting on the device that you are going to use. If you have the audio working on each device, check the video input for each device. Make sure they correspond.
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