dont know if its my screen or my GPU, i have a dell G5 5587. every so often the screen gets lines in it and darkens, has ghosting. i took the laptop apart and redid the thermal pastes, still happens. hooked up to an external its fine, it has done it while surfing the internet, and has done it when playing games. has done it when fans have been on, and when they haven't been on. would a bad LCD cause ghosting of images?