Looks to me like the power supply failed on that hashboard. I would guess one of the FETs failed and took out the switcher.
You may be able to get it working again by removing the bad power supply chips, and running on just the remaining power supplies.
I sent the board for repair, but Bitmain said that the board is not repairable. I am getting a replacement board for $200.
Is that from Bitmain? I've never had to buy replacement parts, are they super high on shipping like for the antminers?
Also, it's been about 30 days of running this thing wide open and no issues