When ever i use my powerbook for sometime, the screen makes a loud snap like its going to break off. I have to pu a lot of pressure to close it also. It only does this when i try yo close it, not when i open it. I bought it about 5 months ago and started about a month ago. Also the powerbook always wobbled while typing. The batt door is not flush with the bottom. Could this be the problem? Or do you think the case twisted in transit??? Please HELP!!! Thanks!!