No Power, #1 LED Stays lit, #'s 2&3 LED's flash
I have an Intel iMac 20", Model A1224, 1gb RAM, that one day just stopped turning on. I opened it up and checked the diagnostic LED's on the board. #1 stays lit. #2 and #3 blink on and off. #4 doesn't light up at all.
When I press the power button on the back of the black, plastic case, the internal fans will attempt to spin, but will not spin. (They rotate *maybe* one (1) degree out of the 360 degrees they would spin.) I can hear a high-pitched sound--kinda like a whirring sound--coming from the power supply when this occurs.
I have attempted to reset the SMC with, seemingly, no effect.
Any advice would be much appreciated.
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I have the same exact issue. Replaced the power supply and 2&3 are still flashing. Did you find out the problem?