Hi, I am hoping someone can give me some advice. I have a G4 Powerbook that I've had since 2003 (yes I know in computing terms that's ancient-but we were getting along fine...!) 15 inch, 1.25GHz/512/80/SD. Replacement battery about 18mths ago, no other problems. On Wednesday evening it completely froze and I had to press and hold the power button to turn it off. And that was it, nothing more, no whirring, no noise-It just won't do anything. Have tried resetting the PMU-several times, ac cable and battery are fine. What I want to know is-What is likely to be the problem? Is there anything else I can do? Is it worth taking it to a shop-or is it just going to be too much money to spend on an old machine?