Try to temporarally by pass the video feed through the 3805. Hookup the 2910 directly to the component input of the projector and switch the audio through the Dennon receiver. Is there still a problem? If so, the 2910 is suspect. I have seen a few DOA's here. Also, the projector could be suspect. . . Try a different video source through the same component input. If that solves the problem, then that points to issues with the 3805 or as mentioned by 2nd rick, bad cable. The 2910 has a 720/1080 scaled HDMI output. Any reason not to use this? I do know that the 3805 does not have HDMI switching, but the 3806 does. Still, with HDMI, why not do the video switching on the projector level?