It is extremely unlikely that you have three simultaneous pic failures. It's more likely that the 3.3V power that is sourced by the control board to power the pic has been lost. To put it another way it is the control board that powers the pic and not any circuitry intrinsic to that particular hashboard.
Are you getting 3.3 volts on the hashboard data connector? Also, as a matter of best practices and expedience post your kernel log in a "#-button-above" sequence.
Cheers,
J
thanks a lot
but i fixed control board and all hash boards by change pic and eEprom and failure asics and one of them lost mp ic and some R in temp sensor line.
now miner work with 80th.