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iMac Model A1224. EMC 2133
My iMac turned itself off & wont turn on again. When attempting to turn it on it felt as if there was no power going to it. I checked the power cord & power strip, not the problem. How do I find out if it's the power supply, adapter or the Motherboard?
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Take the frame off and observe the diagnostic LEDs to the right of the RAM slots. #1 will be on if you are getting power to the power supply. If no light on #2 when attempting to power on, replace the power supply. Heres how to do it: iMac Intel 20" EMC 2133 and 2210 Power Supply Replacement
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Still can't find the LED lights.
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