Solder paste column M705, flux, board washing water with absolute alcohol; board washing drinking water is used to clean up the solder residue soon after repair; thermal gel (specification: Fujipoly SPG-30B) is utilized to smear the surface in the chip after repair ；ball-planting steel mesh, solder absorption wire, solder https://edwingxmbo.ageeksblog.com/30656816/how-antminer-s19-hashrate-can-save-you-time-stress-and-money