iMac 17” 2 GHz A1208 does not boot, no chime, no fans or other mechanical activity. Opened it up to see the diagnostic LEDs. Upon plugging in, LED 1 lights up normally, and LED 2 lights up at about half brightness and before I touch the power button. I have not been able to find any documentation on the two observed behaviors in LED 2 (on only DIMLY, and on BEFORE I touch the power button). What does this mean? Bad PSU? Bad logic board? I have one of each on order. Only “repair” I’ve done on it so far is swap out the clock battery. Thanks in advance for your help.
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17" iMac Won't Boot
- Thread starter _Tony
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I'm sure LED 2 is turning on, because when I plug in the computer, LED 2 comes on a couple seconds after LED 1, and when I unplug the machine, LED 2 turns off a couple seconds before LED 1 turns off. Seeing it in motion it's clear LED 2 is turning on, just dimly. Again, this is all without touching the power button.