First of all, great job on troubleshooting and testing different things!
The power supply units of the PS4 are known to have some issues like you describe. The sound does indeed seem to come from the power supply, meaning some of the components could be starting to fail. So either try to find a cheap second hand unit to steal the power supply from, or order it from a shop that carries it.
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There is an detailed [guide|89196|PlayStation 4 Pro Power Supply Unit Replacement] guide to help you with the replacement once you got it.
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There is a detailed [guide|89196|PlayStation 4 Pro Power Supply Unit Replacement] guide to help you with the replacement once you got it.
PS: Next time don’t stop the fan with your hand but rather try unplugging it. Blocking a fan can damage it.
First of all, great job on troubleshooting and testing different things!
The power supply units of the PS4 are known to have some issues like you describe. The sound does indeed seem to come from the power supply, meaning some of the components could be starting to fail. So either try to find a cheap second hand unit to steal the power supply from, or order it from a shop that carries it.
There is an detailed [guide|89196|PlayStation 4 Pro Power Supply Unit Replacement] guide to help you with the replacement once you got it.
PS: Next time don’t stop the fan with your hand but rather try unplugging it. Blocking a fan can damage it.