You will need to remove the circuit boards from the unit to get to the back of them. You'll need a solder sucker and some wicking wire and remove the solder from the two leads on the back. you might need to wick with the wire to get the solder that is on the front side too.
https://www.youtube.com/watch?v=YCSNWi3UHf4Now with this board you have the second hard part in they also glued them on. So you need to see about how to get the glue off as well. I'd wait to see if Andrew has some great methods as that is likely something that he has done many more times than I.
