I just replaced the receiver in my surround sound. Its a Kenwood v606. It works fine except that at times, some of the sound is gone. I first noticed it in commercials. The music would play but the people would be talking and I couldn't hear them. If I turned up the volume on the tv, I could but not when only the surround sound was on. Every once in a while it would be the same way in some programs. I'm not very tech savy but I would welcome any ideas/solutions.