My xbox 360 has no picture, the audio works, tried games and a movie. The tv works. Please help me. Thank you

This is actually the display chip overheating to fix it you must stop the heat getting to that chip you can actually do this yourself or send it back for repair

Hey there, I have the same problem, it started several days ago, while playing via HDMI cable the colors started to run on the screen, after RESET, no pic but only audio. fixed it with a heat up, and it runs normal on the TV, as soon as I plug it via HDMI it does the same. I Know that it is only a temporary fix so could you please tell me if I do the X-Clamp mod will it help it running norm again? and can the HDMI cable make the processor heat up more than the standart cable with HD siwtch turned on.? thanks in advance.

That's a sign of a "red ring of death" in the near future. If you're capable, the x-clamp mod fix should deal with that problem. Otherwise find someone like me who can fix it because Microsoft will wind up giving you static.