I fixed mine back in february. And it actually just stopped working today. So I'm about to ad some thermal paste to get it working again. The method i used was the stick your whole motherboard in the oven method. It sounds dumb, I know. But it actually worked for me.
Here is a dissasemble tutorial:
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Here is the video:
You must login or register to view this content. <<< Make sure you remove the spongy black things as well as the little sivler battery from the MB beore heating it. Heat it at 425 for 10 minutes. Then you let it cool off before appling Thermal paste.
Also the best type of thermal paste to use is Artic Silver 5 Thermal Paste. Can be bought for about $10. I got mine from RadioShack