Hopefully the image showed you the fried chips :/
(main chip in middle with a star formation burnt into the silicon and U4 (bottom right of main chip)- bulged and blackened)
The BBB shows no power light, I have tried to hard wire the BBB and I do get a brief power light flash but nothing else. - no constant information to keep the board on I am guessing.
Ask Bitmain if you can send a C1 miner in for repair.
(Let them worry about where to find you a new one, if needed, or repair yours.)
BTW
I tried to purchase that controller card from them last year, that was the one C1 component that
they wouldn't let me purchase ... probably for proprietary reasons.
I was going to convert my 2x S3s into a C1 but, I couldn't without that controller.
It would not hurt to try and make a ticket. Asking never hurt anyone.
I happen to have a C1 in my part's bin I have not had time to fix. Doubt anyone would pay what I would want. But does have a perect controller board.
If you can get bitmain to sell just the controller though that is cheapest way.