Took my old powerbook to an on-site gig today. Worked all day on it, everything was fine. Got home, prcoeeded to drop it as soon as I walk in the door. After I dropped it, the airport wouldn’t work, so I searched around google for a bit and came across ifixit.com. They had a nice list of step by step guides for how to fix all sorts of issues on you mac or ipod. Defintely worth a look if you’re having some mac hardware troubles.