Quote from: favebook on Today at 05:50:57 PM

Hashboard does not power on unless it reads all chips from board. You are experiencing same problem as almost every single person who bought antminer 17 series (including me). I've had units for for more than year and then that happens.

What you are experiencing is dead hashboard or faulty PSU. You could try different PSU but I doubt it is the problem.

In some cases putting miner horizontally on one or other side fixes the problem temporarily, but only permanent solution is to fix the faulty hashboard(s) or RMA the unit.

I decided to RMA my S17+ as it started losing one hashboard like your unit and then after a week or two, it lost all 3 hashboards. From time to time it pops up and works fine with 1 or 2 hashboards but that is not how it is designed to work.

I'd suggest you to open a ticket at bitmain support and then ask for RMA. Repairs are not that expensive from my experience, but shipping might be due to human virus spreading around and usual prices are nowhere near cheap either.

But I do another test :

Changed the control unit cable and it changed the error now to hashboard 2!
So it means I have weak amps on one of output (the faulty middle one) right?
I will try to find another PSU to test and will post the result here!