Hi, \nTracking some weird stuff with my H\/K AVR7300 (circa 2004).\n\nI had a power supply go bad a few years ago. It was replaced at a factory H\/K repair center. Hard to remember now if my current problem started as soon as I got it back, but Think it was shortly after\n\nIt presented as randomly getting static in the main speakers (I only run it as 3 ch plus multi room, no rears). I could also be in the center, but most of the time its just on stereo.\n\nThen it would sometimes not allow any audio to flow through to the mains, but if I was sending a source outside to my multi room, that would keep working (sometimes I could get it turn on, no music inside, but the multi room feature would still work, leading me to think that the amp for the mains was the issue.. but... its not due to my 6ch test below).\n\nI've checked for connections on the top DSP board, but can't seem to get anything solid as far as a loose connection.\n\nSpent some time today trying to see what causes what. Oddly, just tapping on the counter where I was testing was enough to cause static. Check out the videos in the link. Same happens when I tap the rear of the unit.\n\nIf I plug an analog source into the 6ch direct, it seems to work much better. (no chance of static). Though when I set it all back up, it was very quiet. A few taps on the side of the unit, and its now been playing at a normal volume for an hour without any issues.\n\nIf you look at the Optical output on the front or back, you can see the red light flickers. When it looses audio completely (DSP on, not 6ch) the optical will turn off. Leading me to think there is some sort of a power issue in the DSP board.\n\nSo far I haven't found anyone willing to work on this. I'm not qualified (I'm handy, but don't know my way around this type of beast). Looking for some guidance on what it might be, where to send it, etc. \n\nI'm in Vermont, so NY or New England preferred.\n\nI can't post the link yet (need 5 posts) so if someone can start a conversation here, eventually I can post the link to the videos.