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loud fan hissing

What must be done to resolve loud hissing fan? (iMac (Retina 5K, 27-inch, 2020)

Posted on Apr 25, 2022 1:28 PM

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Level 10

144,090 points

Posted on Apr 25, 2022 2:12 PM

Please reset the SMC 2-3 times back to back with all wired peripherals physically disconnected.

How to do a SMC Reset.

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