I am viewing one or two bright hrizontal lines on screen most of the time. It is there on different inputs and different pic size settings. It appears mostly when there is a bright picture and the lines are all the way across the screen and are located 1/3 of the way down the screen from the top of the TV. (if any of you know the rule of thirds (layout and design people) then it would be located right at the bottom of the top "third" of the screen. Any one else see this? CanI fix this my self? Could this be fixed with an ISF calabration? My set is the 50HX81, my cable is not Digital, and my DVD in the Panny RP56. The TV is calabrated using an overlay grid for the geomotry 56pt congergence along with a Video Essentials calabration too. Thanks for al your help.