IMET, did you manufacture this board?
The one with the burn marks?

We did make that and it was not damaged when delivered to AMT. One of two things caused that failure. Either the backplane was shorted out (likely to the hash board heatsinks) or the backplane was not connected to the hash boards correctly (off by a pin or upside down).
Or the lack of copper in the board itself cause the trails to overheat. IMET chose to cut costs, we paid the price.