Getting extreme pixelization/audio breakup and picture freeze on various channels at various times. I thought it was a hard drive failure until I noticed it was happening live. Happens on portions of shows, or sometimes the complete show. Doesn't seem to care if it's an OTA over the AM21 or coming in on SAT. The signal strength seems fine all around. Tried resetting, seems to clear it for a while, then it just comes back. I better check the internal temp, but it's quite cool in the room and the ventilation seems fine.