Antminer T21 hash board repair training course

How to repair the T21 BHB68701 hash board 0 ASIC caused by abnormal RI signal?

How to repair the T21 BHB68701 hash board 0 ASIC caused by abnormal RI signal? How to repair the T21 BHB68701 hash board 0 ASIC caused by abnormal RI signal?

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