One.To prevent the distribute of virus while in the firmware, which can bring about damage to the ANTMINER S19 series, the placing purpose of “Protected Boot” has long been switched on as well as “Root Authority” operate has long been disabled. If authorized, your refund will likely be processed in https://antminerbitmains19pro110t39217.goabroadblog.com/33551302/antminer-bitmain-t21-no-further-a-mystery