Strange power on issue, blinking LED #4
iMac powers on irregularly when pressing power button.
With iMac powered off, Led #4 blinks. If I press the power button when Led #4 is in the off state, nothing happens. If I press the power button when Led #4 is in the on state, the machine will power up, and operate properly.
I have changed the power supply and power button.
Any ideas why this may occur?
Is this a good question?