Question Fix Sound Interference on PC

Feb 22, 2023

I have a Lenovo Yoga SSD PC with sound interference (heavy buzzing /humming) coming from the speakers and headphones.

When the headphones are not connected, there is heavy buzzing coming from the speakers, and when the headphones are connected I can hear the buzzing from the headphones. I completely disconnected the speakers from the PC after opening it, but I can still hear the buzzing if I plug in my headphones (no buzzing if headphones are not connected).

This issue started after I had an Arduino Microcontroller connected to the USB port and the PC restarted after a possible short circuit.

Does anybody know what component I can look into that may be causing this issue?