Just got the Motorola DCT6412 yesterday and was attempting to watch NYPD Blue on ABC. At first the HD picture came in fine but no audio. When I would change to other HD stations, no problems. When I went back to ABC, now I had no picture. When I turned the box off and waited for a while, the picture would come back but no sound again. Before I switched to the DVR, I had no problems receiving ABC programs in HD (watched Monday Night Football just fine). Cox said there were no other reported problems but I was wondering if, since ABC seems to be the only station broadcasting in 720p, the box needed any adjustments. When I changed the OUTPUT FORMAT in the dvr menu to 720, I lost my menu and screen. My TV supports 480i/p, 720p and 1080i.