When repairing and testing the Antminer S21+ Hydro hash board, by copying the Antminer S21+ Hydro H6HB70701 hash board PT1 tester file to the TF card, and then inserting it into the Antminer universal chip fixture test fixture card slot, connecting the S21+Hydro hash board, and powering on the tester, you can view the hash board fault results on the computer or fixture screen. Through the fault results, we can quickly repair the faulty S21+ Hydro hash board, thereby effectively reducing the miners’ troubleshooting time.