Hi guys,

Does anyone know of you in detail the 2x LED function on hash boards? Some lights on before start mining S9 on and some are not. And for each piece S9 it's different.
And now I find that the light LED on the hash board, which lights after the next restart is off.

Bitmain has just recently (the current manual for the auto fw is not and probably it's all secret :-) replied that after switching on the LEDs indicate power supply hash plates. But this is not the case, because the CH8 LED is not light on some of the S9 pieces, and for another S9 piece, for example, LED on CH7 is off. All LEDs before S9 start up only on one of my S9 pieces.
I feel that the LEDs after switching on before the start indicates the max hash frequency of the board. Frequency hash boards of the automatic fw is different.

Then, when the S9 is mining, all the top LEDs on the hash boards light up and the lower LED is off.

Thank you for your experience.