This is a friend's PS3, not mine. His PS3 went YLOD a few months ago. After trying a lot of things, he got frustrated and went on with this"give finger" method to the power button and it seems to work for him!
He told me that he has to do this everytime he powers up his PS3, although sometime it will continue working for a little while, as you can see in the video.
Thought it might be worth sharing, in case that this works for some of you.
It didn't work for me, so I had to do the gilksy fix, which worked great.