I have a G4 desktop Dual 1.41GHz machine that has worked perfectly until today. After powering down, I tried to restart by pushing the power button on the computer and nothing happens. After unplugging the computer, letting it sit for about 30 seconds, and then replugging, it will restart normally. But then, I have the same problem.
I read another posting that recommended replacing the 1/2 AA battery on the motherboard and also pressing the CUDA button. I did both of those but still the same problem. I also changed the date/time to the correct numbers.
Does anybody have any ideas?