XBMC4Xbox

So I modded the XBOX. It was booting fine. All suddenly, it stopped outputting anything to the screen. The TV is showing no signal at all from the XBOX. The XBOX's DVD can be open/close with the DVD button. The hard drive appears to be making noise so it is reading something. I changed multiple video cables with the same result. The cables work fine on other XBOXs.

Any idea how to fix this? The problem is I just locked a 1 TB drive to the XBOX. If I can't see anything, my HDD is also screwed. Any hint how to fix this?

Thanks.

Do you happen to have XBMC running on it? if so try the this

"Hold down both thumbsticks (clicked) when launching or booting XBMC. This will cause a screen to pop up asking you if you want to reset your settings (including the active skin) to the system defaults."

Could be a problem of graphic card or CPU overheating (even if the console does not turn off)?