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2011 iMac only booting intermittently

  Doug 20:50 16 Oct 2019
Locked

Hi

My 27" mid 2011 iMac has been stubbornly refusing to boot for the past few days - no chime, no screen activity, no target mode, no external monitor signal, just some disc noise, and of course following SMC / PRAM reset procedures, unplugging... and now today it's booted normally and functioning perfectly.

After reading several threads about these symptoms and probable mother board failure, I'm puzzled.

Any help or advice will be appreciated.

This thread is now locked and can not be replied to.

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