a-4) Check out Should the pins of the initial chip are not soldered perfectly (it was located in repair that the pins are tinned observing from the aspect, however the pins are usually not stained with tin in any respect once the chip is eradicated) Investigate far more Disclaimer: https://antminer-s19-hashboard64297.collectblogs.com/76737658/detailed-notes-on-hashboard-s9