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Model A1311 / Mid 2010 / 3.06 & 3.2 GHz Core i3 or 3.6 GHz Core i5 Processor

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iMac does not power up

Hello, i have a mid 2010 21.5 imac that refuses to power up. The #1 diag led is on but as soon as i press the power button the led turns off and does not come back on unless i unplug the imac from the wall. No other led light up at any point.

Do you think this is a bad PSU or logic board?

Answered! View the answer I have this problem too

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Your LEDs indicate a failed power supply.

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Thanks, i ordered a new psu. I will let you know if this fixed the problem.

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Hello, i replaced the psu but the leds still act as before. I tried disconnecting all non essential components and that did not help. I am guessing this is a logic board error.

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kalt will be eternally grateful.
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