In my case it's not just nerves that feel it. I can get my fingers to vibrate at presumedly 50 hz by stroking the laptop lid. There is an audible hum. It happe

In my case it's not just nerves that feel it. I can get my fingers to vibrate at presumedly 50 hz by stroking the laptop lid. There is an audible hum. It happens with just one charger I have. The other charger just went out with a bang that tripped the fuse. So guess which one I use now.