I appreciate the assistance. I tried the different resolutions as listed, and the order in which things are powered on, nothing works. The tv hdmi's work fine with the cable box and blu-ray. I'm thinking the HTPC hdmi is not compatible with the newer tv hdmi. Is that possible? it worked without any trouble on a much older tv. Any other ideas? Should I try a new video board with hdmi? I would have to purchase one. Any suggestions?