Hi , I just put together a B1 using the board and fets from Pass. When I turn it off, I get a big thump. I then measured resistors on the board, all measured fine except the 2 1M at the #1 input which measured 88.8K. I then switched them out with new ones and when on the board they measure 88.8K. I had nothing hooked up to inputs or outputs when measuring the resistors. Help!