Sorry for the bump, but I'm having the same exact issue with my KSM141. I called Shure and they said that the board is about $37. I'm pretty handy with soldering and fixing things but I want to make sure it's the board and not anything else. If I bought the board from Shure and for some reason it didn't work properly, is there any way that I could create a custom mic with the new board and a different capsule (let's say the tapeop/behringer/naiant/avenson capsule)?