You have retried the nelson board? if you have and messing with the dwell dosn't help withthe was board, you may vary well havea messed up was board, it happens. nothing you can really do with out sendingit back to Mr Drew , but buy the time you ship it back and forth and he charges you an un goddly amount to fix it, your better off jsut finding a Used pandora board on line.
But you all doing everything a tech would do to sess out the problem.Keep up the work, but at some point you have to say screw it and get a diffrent board.
Don't get me wrong I am not saying that this only happens to a WAS board, it happens to all types of boards.