I just got a MS high-def component cable to connect my xbox to my panasonic TH-42PHW5 plasma, through the PT600 tuner Well, both 480p and 1080i signals work perfectly but I simply can't get 720p to display! I see a screwed up picture for a fraction of a second and then everything goes blank. (same symptom for 720p games or any other xbox app (xbmp, etc ...). Does anyone have a similar setup? What could be wrong? I'm running out of ideas ...!