My idea is if it worked and then did not work is you have an intermittent connection somewhere so recheck and reflow all off-board wiring as well as the components on the board.
Hey so I went ahead and reflowed my solder joints and no luck. Barry are you able to confirm the diode orientation for the board, also if I connected the MA correctly.
I am only getting readings on pin 2,3, and 6. But none of the readings are above 1.0v. So I went ahead and resoldered the off board and on board. Still no luck… if I picked very hard on the low E string then I would get a quick dying amp sound, which was interesting but no luck still.