Might be the convergance on the TV as well. Does it happen anywhere other than the game? Maybe it happens to a lesser extent but it may be there. On newer TV's, theres a converge menu that you can go to and the TV will either auto fix itself or bring up an adjustment where you can do it. If you converge and the TV is still showing poorly, you may have to call a technician unless you can figure out how to do it yourself. What brand and model is it?