④ Detect whether or not the pins of the main chip are usually not soldered thoroughly (you'll find tins about the pins with the facet throughout the repair approach, but immediately after taking away the chip, it is actually discovered which the pins are usually not stained with tin); https://spencergzper.blogsvila.com/31608537/the-fact-about-s19-hash-board-repair-that-no-one-is-suggesting