I ve seen   temp on my miner is also -. Maybe it's a crap product. I hope the miner runs a half year and after that i sell  it.

Got it.

Changed network cable and installed Firmware from  April 2017 without hash boards, set pool adresses and i get the bmminer version. Reconnected hash boards and after 28 Minutes i got a mining Maschine

I also have a cable modem. I will try this next days

Short questions, which file Version are on  your miners?

I read  some solutions. First try a good quality network cable. The next one is remove all cables of one hashboard and install one of the firmware updates from bitmain. In another thread somebody tried  the 550m Version but i wouldn't do that. Take the auto frequency first. Another guy wrotes  he insert all 3 pool adresses from  antpool an it works but he said nothing about bis Firmware. And one guy had issues with one fan so the miner reboot every  3 minutes  and doesn't load bmminer Version.

I have no time Next days to try out, maybe you. Pls tell me all

Hello i tried the 201704270135 but Hardware Version shows me socket Connect failed. What can i do?

https://bitcointalk.org/index.php?topic=2615999.msg26697361

Same probs, but after update shows Hardware version : socket connect failed

Hey Leute,
ich hab auf bitmain 2 miner  erstanden. Nun soll ich in USD Überweisen, aber der Empfängername ist 28 Zeichen lang und ich kann nur 27 eingeben. Wie habt ihr das gemacht? Und nein ich habe noch keine bitcoins zum zahlen. Danke schonmal