Tell us about yourself!
Might be very late, but it could be your video settings. Did you have it hooked to a television with a different cable or at a different resolution (720p/1080p)?If so, from the standby position (light red) hold down the power button. You'll hear that initial beep as the console starts up, but keep holding. After the second beep let go. The console will restart and the video settings shall be completely reset (it may ask you to auto detect or set up the video).