The customer came in with a half built unit with 5 hash boards installed. He received the unit earlier in the day (just about 4 weeks ago or so) and brought it to IMET. We did not try to power the unit. Instead, we took it all apart and tested one hash board at a time. 2 of the 5 hash boards received worked. I showed the customer how to test hash boards and gave him a rack of hash boards right from our stock that were never delivered to AMT. He went through the whole rack and saw 100% yield. I gave him 3 working hash boards, and we spent 3 weeks working the pieces of the design that were flawed. We never laid a soldering iron on the PCBs. They worked fine out of the gate.
In the 3 weeks that we were working on the system, there were no problems with the electronics. That particular unit has much more than 4 days on it. At this point, I suspect, it has closer to 10 days as we were running prior to making it available online. I have a machine shop making parts for us now as we are duplicating to get the rest of what we have here running. Unfortunately, it is not much. My hope is that AMT will come through with payment. If not, I'll see what I can whittle away from their bill using other means.
Could you explain in some more details of what this customer needed to do to fix the flaws in the design?
Are these software fixes?
Are these how the heat sinks are mounted on the board?