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‎07-16-2019 12:41 AM

HP Recommended
Product: 8570p
Operating System: Microsoft Windows 10 (64-bit)

A friend gifted me HP 8570P yesterday. 

When I connect the charger to a power source, my light is stable but as soon as I connect the adapter to the PC I hear a buzzing sound from the adapter.

 

1 REPLY 1

‎07-16-2019 06:51 AM

HP Recommended

That is a problem with the adapter. Called coil whine. Just google laptop AC adapter coil whine and you will get a lot of information. Other than the annoyance it is not a major problem but you may want to replace the AC adapter. 

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