My VIP 622 has audio distortion on the coax output for tv 2. It comes and goes but gets so bad at times you can't hear the audio. This only happens on the coax output, I tried direct to the a/v output and the audio's fine. I've also ran a new coax directly to tv2 but had the same problem and also tried a different TV. Still no luck. Has anyone else seen this problem? Any help is appreciated.