I have a problem right now. I wanted to start my laptop and then the noise came from the fan, and the start button also flashed, but the screen was still black and after 2 seconds something always goes off. So this "air process" stops and then comes this very soft sound and then it stops. I really don't know my way around this and am overwhelmed by it.
Battery empty?
Take out the battery for 5 minutes, then plug it in again and connect the computer to the power. Then it should go again.