I had similar problem that has been driving me crazy with my HDVR2. I had serious pixelization and frozen picture mostly on channel 245 (TNT). It was not watchable. Also had a little problem on channel 202 (CNN). I swapped out cables trying to solve problem. I previously was using the S-video and 2-audio on the second set of connectors, and also using the composite audio/video on the first set of connectors. Nothing seemed to fix the problem. After a few hours of frustration, I was going to replace a composite cable to see if it was bad. As soon as I unplugged the RCA video, the screen cleared up. So now I'm using only the S-video and RCA audio on the second set of connectors and nothing on the first set of connectors. So far so good with picture quality. But I miss not being able to use the other connections going to input of my DVD recorder.