I still need help.
It's a possibility your PSU might have gone, however what exactly do you mean by
power and emergency restarting buttons at the same time
To your computer? Because there's not really an emergency restart button on a computer as far as I'm aware.
I don't think most people will know what they're talking about as far as this issue goes in general because I don't think most people will deal with smoke entering the fans on their PC in their lifetime.