Quote Originally Posted by Betty_Swallocks View Post
I had this a little while ago on my elderly 20Gb model and fixrd it with one of the kits available on Ebay. As standard the heat sink is held on with a clip which the kit replaces with bolts and washers. You need to reflow the solder around the CPU and GPU chips using a standard hobbyists heat gun.

You'll find plenty of videos on Youtube showing the procedure. It's simple to do and my xBox is still going strong several months after the operation.
Just did this today. The amount of thermal paste they use is crazy. Longest job was cleaning that rubbish off.

Still its lasted 7 years before going so cant really complain. Its booting and playing fine now so just need to put it back together. Hopefully got a few more months of skyrim out of it.