This situation is generally caused by irregular series resistance welding of CLK, CI, and BO to the front and rear of the X chip, so just target examining these 6 resistors. There's a little likelihood that it is because of abnormal welding of the next pins with the three https://antminers19prohashboard31975.thenerdsblog.com/37161520/5-tips-about-antminer-s19-hashboard-repair-you-can-use-today