Just put together my A/V system two weeks ago. Everything is new - Samsung TV, Denon 3311ci, and HDMI cables. I run quality HDMI 1.4 cable from a Comcast HD DVR to my 3311ci and from there into a Samsung PN63C8000 HD TV. Sound is great, audio is great, BUT - every so often the video goes black for 2-3 seconds and then comes back. Also, when this occurs, the audio does not drop out. Pressing "replay" on the Comcast remote shows that the signal from the cable does NOT have a gap in the video - the missing 2-3 seconds of video is there when replayed. This pretty much tells me that the problem is not with the Comcast signal or their receiver. Happens during play of HD or non-HD programs.
So, I tried running the HDMI cable from the Comcast box directly to the TV and not using the 3311 at all. I kept it this way for two days and the problem did NOT happen. Put the cables back the way they were and sure enough, the occasional blackout happens. I'm deducing that the problem is with the Denon 3311, and not the $3,000 TV. (Thank goodness!!)
Do I have something set wrong in the 3311, or do I have a bad unit?
Jim, in the city of Folsom, CA. (NOT the prison!)