Media player / sound

I have a 2014 Road Warrior, The media player in the garage is a BOSS model#BV6652. Everything works except the sound on the tv when you are playing a dvd, the sound comes out of the stereo speakers. I have checked the input and output plugs and the rca plugs are in the output of the radio and input of tv. I have tried all inputs on the tv....Still no sound... Any help with this will be greatly appreciated.

Thanks

Racinggraphix
 
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