One night I was playing skyrim on my xbox 360 elite with an HDMI cable when the picture started flashing I started to get annoyed. So I decided to turn it off and then turn it on but that just made it worse. Now the Xbox turns on but I can't even see the video and hear the video it just come up with " NO SIGNAL ". I have tried adjusting the video setting to see if it reappears but nothing. IF ANYBODY CAN GIVE ME AN ANSWER ON WHY MY XBOX IS DOING THIS TO ME PLEASE DON'T HESITATE TO TELL ANY ANSWER THAT SOLVES THIS PROBLEM.