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Model A1311 / Mid 2011 / 2.5 & 2.7 GHz Core i5 or 2.8 GHz Core i7 Processor

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Black screen, no power

Hello guys,

So I have a Imac mid 2011 i5 2.7GH/z that dose not power up. I have reset the pram and changed the bios battery out just to be sure.

For diagnostic LED's I get LED1 solid and LED2 will blink once every 4-5 seconds (this causes the fan to power up for half a second).

Note the LED2 is blinking by its self, without the power button being pressed.

I have tested the power button to make sure that its not stuck or anything silly. Also maybe worth noting is that if a usb stick with a light is plugged in the usb stick will flash at the same rate as LED2.

I am unsure as to if this is a logic board or a psu issue and hoping that someone has seen this issue with LED2 blinking with no power button pressed.

Thanks for any help you guys have.

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I hope this helps with your iMac.

Best wishes!

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lee sonsuza kadar minnettar olacak.
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