Solder paste column M705, flux, board washing drinking water with complete alcohol; board washing drinking water is utilized to clean up the solder residue after repair; thermal gel (specification: Fujipoly SPG-30B) is used to smear the floor from the chip soon after repair ；ball-planting steel mesh, solder absorption wire, https://antminers19hashboard87420.blog-a-story.com/11881831/the-2-minute-rule-for-antminer-s19-hashboard-repair