I would connect an external monitor. If the picture is good, either your laptop monitor has gone bad or a monitor cable has gone bad or come loose. If the external monitor has the same problem, it is probably your video card.
Member RevoMaxx is quickly moving up the ranks of Acer Community. He joined us in September and is already making a difference. It's great to see new members like him make a difference only after a few months. Thanks RevoMaxx!