Hi,
As the picture shows, Picture 1
I noticed that one of the 6 power cables came out. but there is no idea when it is. I noticed later. it may have happened while I took it out. Picture 2
Picture 1
Picture 2
Solution
Connect different connector from PSU which has all cables in. After that reboot under miner interface, then can try reloding firmware. If that doesnt help msg Bitmain that you want to send board for reapair.