Its a compaq laptop that my friend has. the fan is completely dead and does not spin causing the computer to cut itself off partway through the boot cycle. How do I replace the Fan? I tried to take the back off of the case to get to the fan but even after I took all the screws out it stuck together pretty forcefully so I stopped and reassembled it before I broke anything. Whats the trip to getting that thing apart. Its about 16 months old, AMD sempron with some ATI Graphics.