A possible fix for a Mac that won't power up

Apr 11, '05 09:46:00AM

Contributed by: menace690

I have a client that has a Mirrored Doors G4. When you pressed the power button, the button would light up, but the computer would not turn on.

Initially I thought it was a power supply problem, as the fans on the power supply wouldn't turn on. I assumed there was enough voltage to turn the light on, but not start the computer.

So I tried using a spare power supply. Still it didn't work. Uh oh, motherboard problem maybe....

Then, on a hunch, unplugged the machine, pulled the clock battery, hit the power button to discharge. Then plugged it in without the clock battery. The machine booted perfectly. I shut down, reinstalled the clock battery, and now the system is fully functional again.

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