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Model A1419 / Late 2012 / 2.9 & 3.2 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac13,2

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Clicking noise in a 27" iMac 2012

I have a clicking noise coming from my 27" iMac 2012 A1419 system

  • I replaced Power Supply board
  • Unplugged Cooler Fan

But noise is still same.

When i start CPU stress test, CPU temperatures go around 90~105 degree, i can hear this noise.

It sounds from Logic Board, i guess.

Update (05/07/2022)

@danj

For testing, i unplugged the fan, but noise is same.

I think this noise is not related with Power Supply or Fan or HDD.

I recorded this noise.

https://drive.google.com/file/d/1GVuTu8l...

After this noise starting , CPU temperature is down to 80 degree.

Is that a throttling noise?

@areeve

In my imac, there is no HDD.

There is only SSD.

Update (05/20/2022)

Finally, i solve this problem.

The problem was heatsink. i replaced the heatsink, and annoying noise and high temperature were disappeared.

I installed the old heatsink in another imac, and there were crackling noise and high temperature.

Thanks.

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The sound appears to be more of a slapping sound than a discharge sound. Clearly someone is flapping around. I would look for a scrap of paper or loose tape within the fan. While you stated you disconnected the fan I'm not convinced you had, as I still hear it!

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Well you had me stumped! 95~105 ℉ is within the normal range. I wouldn't have expected the coolant boiling would have made such a strange sound. Clearly you have a leak in the heat transfer pipe did you see any holes?

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@danj & @areeve

Finally, I solved the problem!

The problem was the heatsink. I replaced the heatsink, and annoying noise and high temperature were disappeared.

I installed the old heatsink in another iMac and there were crackling noise and high temperature.

Thanks.

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I would check the hard drive. A lot of times they start the “click of death” before they fail. Substituição do disco rígido do iMac Intel 27" EMC 2546

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Clicking sounds as you describe is more likely the fan bearing and/or blade hitting the fan's cowling if nothing else is wrong.iMac Intel 27" (Late 2012-Late 2015) Fan ands here's the guide iMac Intel 27" EMC 2546 Fan Replacement

Imagem de iMac Intel 27" (Late 2012-Late 2015) Fan

Produto

iMac Intel 27" (Late 2012-Late 2015) Fan

$49.99

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