I have had my Surface Laptop 3 for 7 months and today it just started the weird buzzing sound. It happens when on power and on battery. I only use my laptop for office and web browsing (no gaming). Not sure what's causing this, but its very distracting.
Second day dealing with this issue and it sounds like the fan is going insane full speed and today is louder than when it started yesterday. I did an update this morning, restarted, but nothing has changed. Would be nice if someone from Microsoft would pop in and address this. I paid $1200 for this laptop 7 months ago and expect it to not sound like an airplane about to take off.