electricity

So this is a very strange issue. I just got a new laptop last week - it works perfectly fine but I realised there's a strong crackling/buzzing noise in my headphones when I plug them to the laptop. It does it with every set of headphones I've got, and it does it even when the laptop isn't...

Hi all, I have few months old Y700 laptop. Few months ago I noticed the performance is significantly lower while on battery. About 50% lower even at 100% battery. When plugged it works normally. A while after I also noticed the hull of the laptop gets electrified while plugged. You can feel the...