Hello, I'm having issues with 2 hash boards in 2 separate S9's. the first is weird behavior, in the next screen caps you can see it,
starts normal and after a while the board 2 (middle) start to show X, some times missing chips, and sometimes the entire board disappears.
I change power supplies, same issue,
change data cables, same issue,
change the board to another miner, same issue
lower clock speed (even to 100), same issue
swap control, same issue
any body have a idea of what the problem could be? i watch a video on youtube that maybe be cold solder points? there is no physical
signals of any damage (burn point in the board, missing components, missing heat sinks).
I contacted bitmain to try to troubleshoot the boards or maybe send details info for repair but the answer is just send the boards to Hong Kong,
I'm hopping that to be last resource.
the second board just seems dead, no lights, no heat, nothing shows on webui, dead.
all miners working between 40-50°C.
miners are Antminers S9-B10 (11.85Th/s - 550MHz)
https://s9.postimg.org/jc1llpelb/image.jpghttps://s9.postimg.org/4u4edpna7/image.jpghttps://s9.postimg.org/4imy0y6u7/image.jpghttps://s9.postimg.org/wwsdktue7/image.jpghttps://s9.postimg.org/yd3w2yxb3/image.jpghttps://s9.postimg.org/oh7eh2gwv/image.jpghttps://s9.postimg.org/6sfnpg55r/image.jpghttps://s9.postimg.org/foqftdvrz/image.jpghttps://s9.postimg.org/5fxynk7q7/image.jpg