Hi, to all
Yesterday my Antminer D3 Chain #3 is disappeared!
I have resetted the Antminer D3, but same problem, I have flashed the latest Bliss firmware but same problem.
The hashrate is the same of 3 chains visible.

What's the problem? How can I solve?
Thank you in advance!
https://s2.postimg.org/za0xc06vb/chain_3_disappeared.jpg