1 - 2 horas
Over Heating PS3 did not boot.
It took about 3hrs since I was being cautious but in the end it was worth it. Beware the guide shows instructions for 80g Model. I have a 40G model so I had to follow a different video on youtube. But finally got it working again!!
I would not buy the heat gun package. Buy it from your local hardware store and return it if you are only going to use it for resurrecting your PS3. I think $25 is too much for 10mins of use.