Man that really sucks..

I kinda had something similar. 1 of my boards hardly hashes at all and I’m currently getting around 10.5 Th/S which is obviously much less. I’ve done everything you have done. I decided to get my money back before I even think of sending it back. Especially cause they will send back a different unit that has been used and abused.

You have 2 that are down. I would probably send it back to get fixed. Or look into the CA shop that you might be able to send it too.

Sorry to hear of your misfortune man..