I have a 622 that has developed a problem with recorded OTA programs. I can watch OTA programs with no problem. All OTA channels show strong signal strength. When I record an OTA program and try to view it, however, the picture breaks up and pixilates too much to watch. I can record and play back programs from DISH just fine. Any ideas as to what I can do to correct this issue or is it time for a new receiver? Thanks for any help.