Three years of pretty good behavior from my Al Powerbook. Just recently, however, the screen has fritzed out on me while I'm killing something in Warcraft. It's returned to it's normal behavior, but only after about 18 hours and quite a bit of futzing with/over it. Likely the logic board needs to be replaced, but there's also a chance that the fans have accumulated years of dust and aren't running fast enough, causing the computer to overheat. What's the best way of dealing with dust and build-up inside a laptop? Can I blow air underneath the keyboard? Applecare has recently expired...given that might it be worth it to take it apart and clean/oil the fans? Appreciate any tips you all have.