Originally Posted by
mikewil
Good point, it was my main one but I have ordered a new one and it is to become a spare/passenger headset if it can be repaired for not too great a cost.
So then, by the sound of it, since it isn't "critical to safety of flight" all you need then is access someone good with a soldering iron.
You could ask your local on-airport aero-electrical crowd to do it, but some music stores have electronics repair facilities and would be much, much cheaper and quicker.