I think the HDMI or DVI cards only work in slot 1. Using a commercial plasma is great, but they are probably built with the idea that video would be coming from an external scaler/switcher, so you should only really need the one input.
How can I get my second HDMI module to work in this plasma. I can only get the HDMI module to work in slot 1. I can't get any video in slot 2 or 3. Only audio.