Re: please help on antminer s9 GH/S(RT) is showing 0.0000
Fortunately, bitmain sent me a free s9 control board even though i am out of warranty already. thanks to bitmain 
can you tell me how do you contact with them?? i have same problem now and nees to fix soon 
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Your hashboard probably looks dead.... You can try to heat it up on room temperature, or put it near radiator, and turn it on again. Try to change cables, and turn it on. If nothing doesn't work its probably dead, and you need to send it to bitmain warranty/repair. You can see on their site how to do that.