"Someone" messed with my XBOX 360 video setting so that now the only thing that will display on a TV (full HD capaable) is an image occupying the right half of the screen while using an HDMI cable. The image is completely scrambled so unable to see the menus. Tried the procedure to power up the console from the remote, then hold down the Y + RT buttons. According to the support note this should resent the console video and the XBOX should reboot. I've tried this a dozen times but no display and no reboot. For the record I have also tried composite and component video connections, and the TV will then report that there is no signal.