I had this heavy flickering in my screen,specialy when the back-ground was dark.Than thanks to the people of the forum I fixed it. The problem was the refresh rate wich was put at a lower state.When I switched to the higher one I noticed that there were only two choices : 60 Hertz and 75 Hertz (what I put). My question is: Is there any higher point i can choose for my SAMSUNG SYNCMASTER 940 BW?