Quick Denon 2807 HDMI question.

I can get component video out to my Sony working np. When I connect an HDMI cable out to my sony. I dont get ANY picture, not even the setup screen for the denon.

I have an XBOX and Scientific HD box going in on component and optical.

This is not a Tivo / Cable Box HDMI question. I have no HDMI devices going into my Denon. I'd just like to get HDMI out to my tv to save cables /space etc.

Any ideas? component works like a charm.

I've searched the web and found plenty of links for the cable box quesiton, but nothing on this.

Thanks

YYV