Hey, folks! I've had a Powebook G4 for a few years now, and it's been treating me well. I'm going to get a new laptop when they hopefully redesign in the fall, but right now, it works well enough. However, lately, I notice that if I move the screen, the lower half (probably a good 4 inches) will freeze/turn white/fragment into bars and will stay like that until I move the screen into a different position, and the lower part returns to normal. It's not a terrible problem, just annoying to have to re-adjust it everytime I open the laptop. Does anyone know what this is called, or if there's a way to refresh the screen, or something along those lines? I tried the calibrating route, but nothing seemed to fix it (just turned the box different colors.)