I have a spare excellent condition white macbook 1.83ghz model for a side machine around the house. So the screws next to the I/O port just seemed to fall out for no apparent reason today. no pressure was put on the system, the screws arent stripped nor is there any wear within the screw holes. i figured they were out id take off the top case to investigate and doesnt even seem like there is anything inside the enlcosure to keep the screws in place. is there a way to remedy this? thanks a bunch!