> > As suggested by you, we shorted pin 2,4,6 & 8 of J31 together (you mentioned > 1,3,5 & 7 but I thing you mean 2,4,6,8) Nope, I definitely meant 1,3,5,7 (1&3 and 5&7 should already have been shorted) as shown in the v1.3 schematic. This would have shorted all the return lines from the temp sensors together. It's unfortunate that this didn't work. If the purchaser of this board doesn't mind (maybe you can offer a discount or something), I'd suggest simply disabling the hardware safety checks (by setting that software flag using roach_monitor.py).
> Next thing was we ran burn-in of the board. The board ran for 30 minutes and > suddenly the protection kicked in, it powered up and down again and shut > down afterwards. We monitored the low voltage supply and observed 1V5 > dropped to 0.9V. I believed something that killed the U51 before was killing > it again. At this point we don't know how to proceed. I have tried shorting > 1,3,5,7 of J31 together but it didn't seem to work. Do you have any idea? What caused the shutdown? Was it definitely the 1v5 rail? Again, roach_monitor.py should tell you the reason for the last shutdown. Is there something on the board that was getting hot before it shutdown? That PSU can supply a lot of current, so I'd imagine any solder hairline traces would have burnt through already. Jason
