I'm hoping I've made a misake somewhere, but it's looking less and less likely. I've got Comcast's Motorola HD DVR (model # DCT6412 III). Using HDMI from box to 4306 in and HDMI from 4306 out to Toshiba TV (34HF85). I'm getting audio but no video...screen flickers from solid green to purple to black and back again.

I've tried DVR directly to TV and picture is fine. It's outputting 1080i.

TV shows 4306's onscreen menu and DVD (also hooked up via HDMI).

I've tried switching HDMI inputs and reassigning them with no changes.

I've tried every possible combination of input signal setting and output setting, none make a difference.

Componet from DVR to 4306 (and HDMI to TV) works fine.

After 45 min on the phone with Comcast technician, they feel the only possible cause is the Denon is somehow NOT HDCP compliant and there's nothing that can be done to fix this. I'm stuck with going back to componet cables to get picture, or sending video direct to the TV.

I bought the 4306 for the simplicity of video switching and HDMI compatibility, did I waste my money or does anyone have an idea of what I might be doing wrong?

I can list all the exact settings/OSD readings if that will help determine the problem (but based on the owners manual, I'm 99% sure I have it all set right).

TIA