1.To circumvent the spread of virus while in the firmware, which can bring about damage to the ANTMINER S19 sequence, the placing perform of “Protected Boot” has become switched on as well as “Root Authority” functionality has become disabled. If approved, your refund will be processed inside of 7 days. https://jaredlfysl.bloggerchest.com/34497804/an-unbiased-view-of-antminer-bitmain-s21