I recently purchased a Denon 2309 for my home theater. The output of the 2309 is connected to a Samsung LNT5265FX (52in LCD 1080P). Inputs are Samsung BluRay (BD-P1500) via HDMI, Cable box via Coax Video, PC via DVI.
Before connecting the 2309 I had no problem with my video from any source. Now the TV loses video once or twice an hour from any source through the 2309. The TV displays a message something like 'unrecognized format' and does not come back. The only thing that restores video is to cycle power off/on to the TV. Nothing special is noted when the video drops out.
Denon customer service said it was a Samsung TV problem. I updated the firmware on the Samsung TV and the video dropouts have decreased to once or twice a day. I see a periodic green screen flash but that's the only other video abnormality I see.
Hope some one knows of a fix. I would send the receiver back except I threw out the box. I like the receiver otherwise.