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Title: Antminer S9 failed after replacing fan Post by: Fancypants314159 on March 08, 2021, 04:57:56 PM As a noob I impulsively went and bought an Antminer S9 off Amazon. I set it up and it ran happily for several days. I felt it was too loud however and like a dope I replaced the outlet fan with a NF-A14 industrialPPC-3000 PWM fan which was much quieter but 100cfm instead of the 200cfm which it came with. The room temp where I have the unit is 17degrees C.
After a few days the hash rate started going down and now it tells me that bminer is not running after operating for a few minutes. Sometimes I see only one hashboard, sometimes I see none. Ultimately I get the following error: Code: bmminer not found= 2135 root 0:00 grep bmminer Have I toasted my hashing boards? Is there a way to tell beyond talking to the control board? Are they repairable with a soldering rework station? Title: Re: Antminer S9 failed after replacing fan Post by: mikeywith on March 09, 2021, 04:15:04 AM Have I toasted my hashing boards? Maybe, but unlikely, the miner has temp sensors that stop it from mining when temps go past a certain degree, if you have not disabled that then it's unlikely that you toasted them. Quote Is there a way to tell beyond talking to the control board? Yes you could measure the voltage and resistance of each individual chip using a multimeter, or buy a special fixture tool, but your problem seems like a bad control board, I believe that if you Sdcard the miner using recovery files and then flash 2017-2018 firmware your miner might just come back to life. Quote Are they repairable with a soldering rework station? If it's a bad heatsink or two, yes, you just need the adhesive and a heat gun, but this isn't a common fault with the S9s, usually, when an S9 hashboard is dead it's so because of a toasted chip or a few of them, which means you will need to order some chips and obviously a fixture tool which doesn't make much sense since this is just a single S9. |