Antminer s1 problem

[maxvolts]

Hi all,

I received my 2nd Antminer S1 from Bitmain today, plugged it in and the fan went straight to what seemed 100%- way way much louder than my first. I turned it off to investigate and noticed the cable from the control board to one of the blades was loose (the blade with the fan plug on it)
Anyway, i plugged this in correctly and turned it on. no fan- but the other blade started hashing. I unplugged the blade that had the initial loose connection, and the fan started again.
So basically, it will hash on the blade without the fan connection with the fan running like mad, but as soon as i plug second blade in the fan stops.

Any ideas folks?

[1714802634]

1714802634

[1714802634]

1714802634

[Boris-The-Blade]

Hi all,

I received my 2nd Antminer S1 from Bitmain today, plugged it in and the fan went straight to what seemed 100%- way way much louder than my first. I turned it off to investigate and noticed the cable from the control board to one of the blades was loose (the blade with the fan plug on it)
Anyway, i plugged this in correctly and turned it on. no fan- but the other blade started hashing. I unplugged the blade that had the initial loose connection, and the fan started again.
So basically, it will hash on the blade without the fan connection with the fan running like mad, but as soon as i plug second blade in the fan stops.

Any ideas folks?

Replace the fan 

[maxvolts]

You think a faulty fan would stop one of the blades from hashing!!??

[SecureErase]

Hi all,

I received my 2nd Antminer S1 from Bitmain today, plugged it in and the fan went straight to what seemed 100%- way way much louder than my first. I turned it off to investigate and noticed the cable from the control board to one of the blades was loose (the blade with the fan plug on it)
Anyway, i plugged this in correctly and turned it on. no fan- but the other blade started hashing. I unplugged the blade that had the initial loose connection, and the fan started again.
So basically, it will hash on the blade without the fan connection with the fan running like mad, but as soon as i plug second blade in the fan stops.

Any ideas folks?

Remove fan and attach it to other end of AntMiner.

[maxvolts]

I will try that when I get home from work, using the other fan plug though- won't that make the fan run on full all the time though? I didn't think the far end fan plug was speed controllable?

[helipotte]

Check the temps, does one blade show 127C?.  I received an S1 that did that and it turned out to be a bad temp sensor.  The sensor is located right in the middle of the blade. 

It is an 8-pin device that has "LM75" on top.  After I replaced the sensor, the fan(s) behaved normally.

Hope this helps!

[maxvolts]

Hi there,

Thank you for all your help, all sorted now, I removed all the ribbon cables and refitted them, and all is good now!
Both Hashing away at 375 now quite happily!
Just need to put a pull fan on the back of my new S1 now, I can see around -3 degrees on my first unit with a cougar fan.
Cheers guys!