Fixing an iBook Logic Board

OK, I have an iBook G3 with a busted logic board. I sent it away for someone to weld something, and that fixed it for a few months. I do not want to pay $75 dollars to get it welded again, because I feel like at this point I could try it myself.

Does anyone know of any tutorials, or like some step by step instructions, on how to open this baby up, and where to weld? Thanks.

Edit: I heard there is an easier way to do this, wedging something into the LB and attaching it with tape or something. This would be preferable. Any ideas?

 

As far as I know, people do it all the time. You are right that I probably won;t be able to do it, though, as I have no patience. I just don't want to pay another person $75 dollars to do it again. I would probably pay less than that, but that conversation is reserved for the marketplace if this doesn't work out.