It is probably not a problem with your tv-set. The problem lies in the videocard.

Just change the pixel format in ati catalyst from YCrCb to RGBFull and it should be ok.

I've found the solution here: http://devforums.amd.com/game/messageview.cfm?catid=279&threadid=118278&STARTPAGE=1&FTVAR_FORUMVIEWT...