When changing a brand new chip, it is necessary to tin the chip pins and then solder them towards the hash board. Implement thermally conductive gel evenly over the chip’s area, then lock the heatsink. Repair method: check the appearance, measure the chip capacitor or resistance in front, normally https://alexisaujxl.blogrelation.com/37603638/the-fact-about-s19-hash-board-that-no-one-is-suggesting