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Repair guides and support for 27" Intel iMacs by Apple, introduced October 2009.

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Why doesn't my iMac turn on?

Hi,

my 2010 27" iMac fails to turn on. I replaced the power supply thinking that was the problem but it still won't boot. When I plug the power in I see the 1st diagnostic light blink 2 times then it stops and nothing, no fans or anything. I tried a different power outlet, different power lead. I even used a different EMI FILTER.

All I get is 2 blinks of the 1st diagnostic board light.

Can anybody help me?

Thank you

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Try isolating the RAMs, Hard Drive and the WiFi Card.

If it still persists - it might be the logic board.

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1 Comment:

same thing i was gonna say, try removing one of the RAM , take it both out and try one at the time as well as try it on different RAM slot

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