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Liwes Student
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HP ProDesk 400 G2 - Hissing Noise

HP ProDesk 400 G2
macOS 10.14 Mojave

Hey!

I've got HP ProDesk 400 G2 with i5-4570S. When I have bought it, PC started to... emit this hissing noise:https://drive.google.com/file/d/14auU06FJhveYd7MF235k98T1vsDYvZUH/view?usp=sharing 

Right now, I've swapped old PSU for new 500W - I thought, that PSU was source of problem. Nope, it's still hissing. Any ideas, what may be source of problem?

There's only one fan on CPU, nothing more.

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Regents Professor
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HP ProDesk 400 G2 - Hissing Noise

Greetings,

Welcome to the forum.

I am not a HP employee.

 

I listened to the sound. It sounds like a hum and then a high pitched sound.

 

Is it coming from the speakers?

 

It could be the CPU fan if you have no other chassis fans installed in the system.

 

Regards

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