Back in the spring I had a 622 that on HD Channels there would be no video just sound... Went through the whole tech spill where I unplugged the unit waited 10 seconds and then would power back up. The unit worked fine, but would start the whole no video on HD channels all over so Dish sent me a replacement 622... Fast Forward to this week and it was just as if my other 622 has returned... Once again on the HD channels there is no video, but audio... Just for sheets and grins I hooked up my small HDTV to the unit and on it there is no video either... I am on WA with 65 to 80 on 129 and 80 to 100 on both 110/119 so signal is not an issue... I have seen other people having the same issue which I am curious if it is an issue with MP$ Compression as it does not seem to bother any of the standard def channels just HD or is it a software glitch which is a part of the current software which on mine is still at 629? I should not have to be rebooting a RCVR as much as I do to make it work... I really like the HD stuff, but man my 625 that I had was solid as a rock and other then the Hard drive crashing about 3 years ago with it I never had any issues... Any suggestions before I once again call tech support??? CC