If your laptop is misbehaving - show this picture to it and say "Stop that, or I'll get Stan round to rip your screen off".
This is a previous laptop of mine which I dropped, busting up the screen. I've used it on my home network for a while to play around with Linux, but I didn't do anything about the screen, which lit up with an abstract tessellation of jagged shapes.
Yesterday I was running a huge fever from a bout of man-flu. I had a sudden crazy desire to remove the screen - after all, it was just wasting power lighting up a screen that wasn't being used. Sweat was dripping off me as my shaking hands levered up the keyboard cover, unscrewed the monitor retaining screws, removed the screen and relocated the bits-and-bobs that were attached to it. I felt like Doctor Frankenstein creating a monster.
So now I have a headless laptop that has been very well behaved. As have all the other electrical appliances in my house. I think they're scared that the same will happen to them : either that or they're plotting silent revenge for mutilating their comrade.