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My ps3 had the YLOD. Bummed, but i found out that there were fixes and kits for this.
Swimmingly. I couldn't mess up if i tried.
Your ps3 will be different. I had a CECHE s/n model, which has a few more screws to deal with. Also, consider that you're ps3 was assembled by relatively unskilled hands, so it's not complicated to take apart and put back together.