Switches could make a buzzing sound because the electrical contacts aren’t making a good connection and its arcing or it could be arcing to the electrical box. You need an electrician to look at it.
LED light flickering
I have a light fixture with a built-in LED bulb that recently started flickering, I was wandering if it is possible to fix by hanging the transformer, how can I know if the problem is the bulb or the transformer?
@twist If the fixture is still around, you can usually fix it by changing the LED driver, when LED bulbs start to flicker usually the power voltage is not constant.
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