I believe I've got it figured out. Not an issue with the denon or any of my equipment. The problem seems to lie in the hdmi cables that comcast provided during the installatIon. The cables they gave me seem to have a bit of play in them when connected to the dvr port. I noticed if I slightly wiggled the cable that the picture would go in and out. I tried another cable, also supplied by comcast, and had the same issue. I wasn't having the problem when I connected directly to the tv because I have a high speed "in wall" grade cable permanently running through the wall to my tv, which apparently had a better connection. I currently have a rubber band holding the comcast hdmi cable firmly in place to test the theory. And have not experienced any signal loss for about 48 hours now. Looks like after a trip to the shack and I will be able to put this all behind me. Thanks to all who attempted to help me resolve this issue!
... View more