I'm messing around with the firmware on one of my (known good) boards. The quick hack I'm doing now just runs the self-test on startup for a couple minutes. If there is an issue with the PCB where there is interference at low temperatures, it might be difficult to correct with firmware. My board has a heatsink on the bottom side, but what I’m seeing is the board doesn’t actually get that hot in the self test at 0.85V. I’m finding it’s only drawing 51A and getting to about 25C in a 21C room. If I raise the voltage to 1V I get 85A draw and it stabilizes at 32C or so, which still isn’t really that warm. It’s not until I get up to 1.1V or so that I start pulling ~120A and the temperatures get up to 50C or so.
Basically, I think people are likely getting the boards a lot hotter with a hair dryer than I will be able to by running the board, if I have to run it at less than 1V to keep it stable. I'll give it a shot on my bad board tomorrow.