Jvc no sound when i have tv on

If your using a cable box or dss or fios, use whatever "input" your system has. preferably optical, or digital coaxial. all cable boxes dss and fios receivers have both optical and digital coaxial outputs as well as standard rca.

If your not using a cable box and are direct from the TV to the stereo, then it depends what the TV has. Most TV's have at least a "monitor out" that's analog rca. If you've got an LCD, Plasma, or digital TV, chances are you have an optical out. All that you really need to make sure of is whatever input you use on the JVC, when you want to listen to TV, it's got to be set on that input from the front. ie DVD/DTV/Vid 1/ Vid2/etc showing on the JVC display. That's the input on the back you must use to hear it. If you have any more questions, just post a comment and I can help some more. Hope this helps