If you are getting connection refused error, that mean, the hash PCB is still initializing. You may have 1 damaged or degraded hash PCB mixed in the unit.
You may want to hash 1 hash PCB at a time and see if all 3 works as separate hash PCB or if there is a bad one in the mix,beofore downgrade it to the older firmware.
Hello, if any body can help me, I flash the new firmware from bitmain for the S9 (Antminer-S9-all-201611190345-autofreq-user.tar) but it doesn work, it shows "Socket connect failed: Connection refused", I already let it for an hour and nothing, I need the original version, according to my other miners is the one from july 11, like in the next picture, thanks!