I am trying to hook my XBOX 360 up to my Philips LCD TV using the VGA HD AV Cable I purchased for my XBOX. When I hook it up, the sound is there, but the Philips TV displays a message saying that the Video Format is not supported. Cannot change the format on the XBOX, as you have to have the cable hooked up to get the menu to come up. Is there an installation proceedure to enable this port on the Philips TV?