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Epoxy?

I have read that opening the laptop and putting superglue on the right parts might reduce the noise.

Yeah, do that and you may cause the power converter to overheat and die because the superglued inductor may not get enough airflow over it anymore.

These wonderful "fixes" (along with people "reflowing" stuff using heat guns) are a great way how to turn an annoyance into an expensive to fix failure.

Heat dissipation in an inductor should be small - if it's significant the Q of whatever power converter its in will be bad.

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