I've been having problems with mine since i got them. I can't get them to hash more then a few minutes before throwing errors. I decided to look at them with the thermal scope here are a few pictures sorry about the quality. you can see one board that looks fairly uniform then the two others with some very hot spots. They get plenty of cool air constantly and all screws were tightened before first hooking them up.
Thank you for sharing those pictures! They're much better than the IR thermometer I've got! And they do confirm some of my power distribution concerns. If we could isolate some of the issue, there may be some thermal management we could do, or rework that can reduce the issue. There has to either be unbalanced load somewhere, or way too much resistance somewhere. If we could improve that, maybe we could save these before they fry entirely.
On a brighter note, we finally got a response from Phasebird regarding RMAing our defective units! Now I have to figure out how much shipping to Hong Kong from the USA is and whether it's worth the expense!