Just got my S19 Jpro+ miners and wow, they went back to solder for the heat sinks. One even had a heat sink rattling around inside... bad solder job and chip debris everywhere. Power'd them up a couple weeks ago, so we’ll see how it goes.
Old news, man. You’ll find a few threads on this topic. Just remember to run them cool. Treat them like fragile china! I’ve got half my S17s set on low, lying on their sides with the bigger heatsink up.