Previously my htpc was connected to my panasonic ae900 through a vga cable and everything was fine. Then I recently bought a dvi to hdmi cable and if I try to turn the projector on with the cable attached it shuts itself down. If I unplug it before I turn the projector on it starts up fine then I can connect the cable again and it all works but I have to disconnect the cable before I turn the projector on every time. Any thoughts?