A week ago my good ol' G4 wouldn't start up anymore. I would push on the power-button, but nothing would happen, not even a sound or a hard-drive spinning so I took the machine to a repair-shop. It turned out that all they had to do was to "reset the motherboard". My question is: Is this a common problem ? How difficult is resetting the motherboard ? Is there just a button you have to press, or is it more involved than that ? Not that I'm planning to try it straight away, just curious.