Solder paste column M705, flux, board washing h2o with absolute alcohol; board washing drinking water is employed to scrub up the solder residue immediately after repair; thermal gel (specification: Fujipoly SPG-30B) is utilized to smear the area of the chip immediately after repair ;ball-planting steel mesh, solder absorption wire, https://ricardoebtlc.bloggazzo.com/30782055/an-unbiased-view-of-antminer-s19-pro-hashboard