I've tried on two different tv's. a 27" Sony Trinitron, and a 27" RCA (some new one thats made for xbox's, has some port for them, since i have an xbox also) Both TV's have the vertical lines, but the Trinitron shows them alot more than the other tv. As someone mentioned, its not rain, although I do know what your talking about with that, its generally only seen during light changes like others have said.