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Model A1312 / Mid 2011 / 2.7 & 3.1 GHz Core i5 or 3.4 GHz Core i7 Processor, ID iMac12,2

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Loud Fan - Logic board and one of the capacitor bad?

I have an issue with the fans spinning full speed after SMB reset. Otherwise the run fine but CPU only runs half speed.

So... slow ecu or Loud fans are my choice here. Should I resolder the pins on the capacitors?

Thank you so much.

Update 11/15/17

I have installed SSD in place of optical drive and reused the temp sensor so its on the SSD now.

When I do Hard reset the Imac will run on Full Blast, but when I do P R reset the fans quiet down and i can control them by software but the CPU runs only half speed!

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Answer this question I have this problem too

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Have you changed out the hard drive from the original?

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Hey Paul. Check if this answer attends to you: Faulty CPU/ODD sensors or fans after Dual Drive Kit Upgrade

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Paul will be eternally grateful.
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