I have a 722 connected to a single TV. I keep randomly loosing connection on 61.5 HD channels on TV1. When I switch to TV2, everything is fine. I've checked the signal strengths, and they are lower on TV1 or don't connect at all. I've had three different receivers (2 622s and a free 722 upgrade because I threatened to cancel everything), splitters swapped out, and the 61.5 dish LNB replaced. FYI - I have a separate dish 300 for the 61.5 channels. Has anyone had this issue, or know what the problem could be? The only thing left to replace is the cabling from the dish to the receiver including all the interior cableing that was put in when the house was built a year ago. Could a bad cable run cause this?