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Why has my CPU started emiting scratching/ whining noises?

My laptop has recently started to make a peculiar high pitched whining/ scratching noise, after taking a good long listen, and testing both my fan and my hard disk, I'm 100% sure this is my CPU that is making the noise.

I'm a little concerned as this is the first time I have heard these sorts of noises from this machine.

Possibly related, shortly before the noises started, I had taken my machine apart to clear it of dust, as it had been having some minor heating issues. I had taken the heat sink off to clean underneath it. During this process, I removed some thermal grease on a plastic insert, as it was caked in dust. Any possible coralation? Would acquiring and applying more thermal grease help resolve this? I was careful to make sure the CPU was coated in the same amount of grease as I had found on it, and I'm 95% sure the heatsink was remounted properly.

I get this noise mostly upon cold boot and the first 10-30 minutes of uptime. If I'm gaming on my device I can't hear it as much, (no the fan/ disk don't drown it out), it drops in pitch a little bit and usually becomes inaudible after the CPU heats up past 60 degrees.

This is one of the most irritating noises I have ever heard, and it is slowly driving me nuts. Any help or insight into why this is happening would be greatly appreciated.

Thanks.

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Hi @whygodwhy ,

Very rare for "ICs" to make any noise without actually failing shortly after. I'd be looking back at the fan. Perhaps some "dust " got into the bearings

完成的

I'm 100% sure it is not the fan, I took out both the fan and the hard disk and booted to Luinx via an external USB drive and it was still making the noise

完成的

Can't tell you how to fix it, but I can't tell you that is almost certainly coil whine.

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Coil whine. Perfectly normal.

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My conclusion as well, thank you. Any ideas on how to mitigate/ resolve?

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Not really. Depending on the frequency, it may only be heard by some people. I can here coil whine in a ton of stuff when others can't hear it at all.

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my laptop is not open but it’s battery is charging why?

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