Xbox 360 HDMI problem Up until recently my 360 has always ran 1080p HDMI on my Sony Bravia, but 2 weeks ago when I turned the TV on it would say no signal.. I know it isn't the 360 or the hdmi cable because I tried different hdmi cables and tried the 360 on another tv, which worked perfectly. The component cables that came with the 360 work but I can't bear to play in 480 anymore =[ Has anyone had a similar problem? Will I have to replace the board in the TV or get a new TV in general? PS) I've tried all 3 hdmi ports on the tv none of them work.