if i am gaming or not these horizontally fading blue lines are moving vertically across the screen the lines are not solid but u can notice them flashing all the time i did test my video ram 3 times no errors i did fur test no problem, i test the monitor on a laptop for 10 minutes the screen was fine i updated the driver nothing changed the heat of the video card is fine actually very good i played games with intense graphic and no problem no restart no blue screen no errors !! i don't know where these blue lines come from ?.. the video card is GTX 560 1G GDDR5 ,the monitor is Samsung 19" please i need help these flashy lines are driven me nuts ,thank u