I have this XTC module modded by Gigmods and the treble does not work. The push pull switch on the master of the module does nothing as well. The master volume does work. Not sure if i should be looking at the treble pot or the 2 caps its hooked to. I'm guessing the push pull is a treble boost? nothing looks burnt on the bottom of the board. Could the module work with a bad part in the tome stack? Thanks for suggestions!