Hey everyone... My Powerbook G4 (15" 1.67GHz) has been giving me a lot of problems and frustration. In a little more than a year, I've gone through two logics boards and an Airport card. All of these repairs have totalled a good amount of waiting for my computer to be returned to me. Unfortunately, I think there's another problem with my computer again. The screen doesn't turn on when I open my Powerbook sometimes. I can still hear the hard drive, but it won't turn on again unless I shut the computer down by holding the power button, and starting it up again. This gives me reason to suspect that it might be the logic board again. Do you guys think my Powerbook is a lemon? I don't want to go through another repair and was wondering if Apple would be willing to replace it for me. I don't know what they would replace it with since they don't make my model anymore. Any help would be appreciate guys. Thanks!!