Foxconn motherboards... have you cleaned any cMPs after they've been sitting still and running for a few years? Avery hole where a screw goes in to attach the board to the case or tray corrodes. Then they're sold on eBay with cheap SSD drives, cheap hard drives and bottom of the barrel GPUs for premium prices. That's what I was talking about.
Maybe your place on planet earth is more corrosive than mine