|The PS is pretty involved when opening it and trying to access the motherboard, unlike the Xbox the PC has heat covers and various noise dampening shields/covers, as long as you have a system for opening and placing each piece you remove, you should be good to go.|
You will need to open the PS3 and remove the motherboard, once you have remove that, you will need to remove and clean the CPU cooler and apply some good quality thermal grease such as Arctic Silver 5.
the whole process should not take any longer than 40 minutes to an hour. This includes reassembly,
You should watch a couple of videos on YouTube and become confident with the process. Then tackle it, its already broken so you cannot do anymore harm, right? Plu its fun.