I seem to be having the same issue. My problem is I do not know how to solder and a local shop said they would charge me $50 to do it… a replacement costs $50 on Amazon but I have a Halo special edition one so I don’t just want to replace it either. I think I’ll buy a used one and switch out the board which is really easy to get to. I followed this video which is for a different version of the Mixamp but it’s basically the same thing https://www.youtube.com/watch?v=46aOiGsATzA