Hello,
You disconnected Chain 0 or Chain 2 ?
Try to measure voltage on metal plates when miner is powering up, not 12V output to control board.
Normal output voltage is 18V (first voltage check) ... second is 20V, third 21V ...
Try every chain separately and give us result.
M.
sorry, I disconnected chain 0
I dont get what you mean by first one is 18v and second is 20 v , do you mean voltage for each hash board ? and between which points i should measure the voltage ?