I had the exact same problem. My husband researched online and found the information provided in one of these responses (#5 ALFC) worked perfectly.
We were really skeptical that we'd be able to follow the directions and get my laptop to work, since we have never opened up a laptop before. After a quick trip to Radio Shack to get the thermal compound, it took us a couple of hours, but we managed to follow a couple of YouTube videos showing step-by-step instructions without mishap. I'm happy to say my laptop is now working just fine!
A couple of tips:
1) Be sure to make notes to identify which screws go where. It took us a while after we were finished to figure all of them out.
2) For those "technically challenged" folks, you might have better luck following this step-by-step video to make sure you remove all the components properly: