Chosen Solution
I have a Samsung 40 inch TV with faint white horizontal lines , someone said it maybe my gateway drivers or a bad screen , are gateway drivers replaceable model LN40D550K1FXA
@bigjets no they are not unless you can get to the panel, have the right equipment, and the right IC. Here are a couple of images that show the location. They are not on separate boards but on boards that are connected directly to the LCD.