I have a Samsung TV and yesterday I was playing my xbox on it and everything was fine, today when I turned it on the screen is fuzzy. I have tried everything I can think of to fix the problem. What could be causing this problem? Also I'm in Farah Afghanistan and its about 100 nearly every day now only to get hotter, could the heat be causing the problem?

Hook antenna or Cable directly to TV and select a good channel to test.
You need to determine if it is TV or Lack of Signal.
You could use VCR or other source to test TV.