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:


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?