So chip / heatsink issue on most of units, and yet Bitmain claims if heatsink is loose or chip is burned that warranty for that board is voided, so sad.
Are you sure about this? assuming you haven't disassembled the miner the warranty is still valid no? I honestly never understood their warranty program, when I read how they offered to send technicians to the mining farms in china to fix their faulty 17 series and how was Jihan wu "begging those miners to give Bitmain a second chance with the S19" it looks like and for obvious reasons, the way they treat large farms is way different than how they treat the average joe like ourselves, I don't want to keep repeating this but I hope this serves a lesson to avoid the 17 series, and not buy any 19 series mining gear until reports show that they have a reasonably low RMA/failure rate.
Today one of my friends lost the last working chain on his S17, it would show 0 Asics, sometimes more, it became unstable and useless, he bought that gear for 4k back then, most certainly way too far from ROIing on that gear.