I have a mac where I get up automatically light (F1 and F2). It stands firmly on the screen, and when I try to take it down (F1), so it automatically goes up to F2 and then it remains that way on screen. Other times when I look at such movies then the dashboard comes up and other commands automatically up.. Do not know what this is and is very annoying. Someone who has had the same problem or know how problemms can be fix?