Each miner was connected with 1 Bitmain APW3++.
None of the PSU's were damaged. I have dissambled the hashboards 1 by 1 and in 2 hashboards while measuring the resistance and voltage, 2 chip's in each one don't have the values like the other ones. As for the other hashboards the chip's values seems to be ok, i am checking the other componments but no luck. As you said it is very difficult to find resources on Avalon miner repair,and I am relying only in my knowledge from S9 repair.