Yeah thats a possible issue.
But now Im wondering exactly how does a working a1 work since you plug it in? I forgot their normal behaviour!:(
should it start with very low speed (big)fans? didnt they start with maximum speed and then turn down?
the 4 LEDs on the control board representing 4 hash boards dont do anyyy blinking until the pool is connected??
and the mining program on the control page doesnt show up until the pool is connected?
Im afraid the problem be the psu's 😢
could anyone having A1 answer me🤕

I have somehow a same problem also an experience about that.

once I connected my hashboards with wrong polarity(-+) and my psu went bad. I opened it up and fixed burnt lines but since then it couldnt start the processing and didnt show anything in status. it just said wait until the mining programis started. I figured out it could just be the little chip inside psu. I changed it and the problem was fixed.

But now, from the time viabtc pool stopped working, my miners (2of them not just the one fixed) start just like that time! they dont show status and they dont work.
anyone got any idea about this problem?