Old MacBook Air

Hi all,

My beloved (but old) MacBook air died on me last week.

I was using it and al of a sudden the keyboard was not responding anymore. I closed it and when trying to switch it back on, it wouldn't pass the opening sound and blank screen.

After trying all the commands recommended in the forums and after a live apple chat, I was advised to take the computer somewhere.

Today they advised me the logic board is dead and it needs replacing. As the computer is too old, they don;t produce new ones, therefore computer is dead.

My question: how do I find a second hand logic board for my old computer to try and replace it?