can anyone advise here or on PM
my latest S9 just lost a board in other words it was working fine for about 24 hours then i made a psu change and it just stoped hashing. two interesting details, one, the miner detects the board but no its not hashing at all GH/S(RT) shows 0000, two, if i connect that particular board by itself it does hash, but only by itself.
any input or advice will be greatly apreciated
i tried diferent psu
and i tried changing resetting all settings
same result
Sounds like a hardware issue. Since it's clearly not the PSU or the board to controller cable...
1) Shut it down for about 30-60 min , then reboot it and see if all 3 boards come up. S9's are quirky and sometimes just giving them a short rest (allowing them to cool I think) can solve an issue like this.
2) Replace the primary controller board with one from a working S9 - if all three boards come up, you have your problem.
You can get replacement controller boards from BitMain for $60 + S&H and they are cheaper and faster than sending the machine in for warranty service. We keep a couple dozen around here (I've got 84 S9's) and a replacement solves these sorts of issues about 60% of the time.
If it's not the controller send in just the bad hash board for repair and let the unit continue to run at 66%. We never bother with warranty repair, we just send them into BitMainWarranty and pay for the repair no matter if the unit is 1 week or 1 year old. They will turn it around pretty quick.
Not sure where you are, but never ever allow the machine to run for any length of time above about 93 or 94 degrees ambient. 34C in take air is our hard/fast max or we shut the machines down. At 35C, like clockwork, we start loosing boards. Make sure you have clean power coming into the PSU.