I have my TV hooked up to Directv which also gets audio/video fed to it from a DVD/VCR player. The whole system feeds to a Panasonic SA-AK17 stereo that goes out to surround sound in the living room. When I play the radio or a dvd or any other audio through the stereo it plays for a little while then the sound suddenly stops. The every device keeps running but there is no sound. If I turn the stereo off and turn it back on, then the sound is back for a short while (ranging from 1 second to about 5 or 10 minutes). Why is the sound stopping randomly? How do I fix it?