For a while I have been experiencing this weird freezing and then the screen fades to white, to black and syan colors . This could usually be fixed by shaking the screen, but now it has come to the point where i need to hold my hand on the top right of the screen to keep the screen from freezing like this. Is this a common issue on old powerbooks? Is there any way I can crack this thing open and fix the problem? i opened the comp last night and on the motherboard no cables seemed to be loose. I think its inbside the screen and or around the hinges. If anyone could help I would greatly appreciate it. I have a 17 inch powerbook.