I have a JVC rx-6042 reciever i use for music and movies in my apartment and a week ago while watching a movie in dts a loud distortion sound came through all 5 speakers and it than there was no sound at all. I tried several differnt things to try and fix the problem not beliving it was an internal issue, I unplugged all the componets to try and isolate the problem and at best i could get stereo sound which would cut in and out alot, If i tried swtiching to dsp or pro logic 2 the sound would cut off and not work. So i took it in to get an estimate and the guy phoned me back today and said it was a circuit borad failure. So i was wondering how could this happen seeing how its only 3 years old, its well ventilated, and its only been used moderately at best. If the circuit board did fail would it still turn on and have sound in stereo? and is there any way to prevent this in the future?