Anyone Work on PS3s?

[rawfuls]

A few guys at my school, randomly came up to me and asked them to take a look at their PS3, of course I ask what's wrong with it, and I'll look it up, and see if I can do anything.

One guy has a bad laser apparently, he gave me symptoms of the disc just not reading, the motor sounds like it works. He asked Sony and they asked $150 (I'm assuming it's out of warranty since everyone is reporting this when they're out of warranty and wanna send it in) just to fix the drive.

Of course the PS3 is a blu-ray, which is why this bugger is gonna be a pain to fix, and expensive!

I need the PS3 laser pretty much.

The second PS3, all I got from him was YLOD (Yellow Light of Death), before he ran off to class, I'll catch up with him later, but I'm assuming this is kind of like the Xbox's RROD, which is a heat issue and solder issue with the CPU and GPU.

Since PS3's aren't that popular, not many sites I can find (Haven't tried youtube yet).

Sounds like I would just need washers for a temporary fix...

My question..

Anyone out there ever work on a PS3? Was it worth it (If you were paid) to fix it? What was the problem with it, and last but not least, any advice?