Re: DRILLBIT SYSTEM Miners - Thumbs (Temp NA), 8 Boards (0 left)
Just before I read your update,another one went out 
So,I shut the last one off to save it until we know whats up.......................
So,I shut the last one off to save it until we know whats up.......................Are you getting magic smoke or burned surface components that damage the pcb? That's the main thing I could see causing the repairs to be difficult.
Nope,no smoke,no burned components,thank god....I worked with Steamboat assembling units & he showed me some boards that had solder overrun,missedplaced parts,etc.
I see nothing wrong physically with these boards.I'm no expert,but I have built several hundred high end gaming PC's in the past 14 years & have seen ALOT of screw-ups from the factory.....none are visible here
Basically I have the same experience, no magic smoke, no burnt bits on the board just a dead board that made the USB unplug sound on my Windows box.