TechMed Posted July 31, 2022 Share Posted July 31, 2022 Hi All, TLDR: Case powers up and immediately powers down. Will continue to do it until fully unplugged - wait 30 - plug in and boots on second cycle. First, Chenbro support will not even respond; tried SIX times! This will be my only, and LAST, case from them. It is has been SuperMicro, and will continue to be forever! Anyway, I have this Chenbro NR40700 case that I bought new (old stock) and was clearly and obviously brand new. It came with two of the custom EMAC power supplies. From day one the unit would continually power cycle (1 sec on, two off, 1sec on, two off......) and will continue to do this until I unplug the unit, wait 30 seconds, plug back in and "cycles" once and then on the 2nd try will fire up. This is completely repeatable. I have replaced the two original power supplies and even have the thing loaded with all FOUR power supply slots filled and plugged in. I checked all of my power, etc plug in connections to the back-planes. I currently only have 14 spinners and one SSD scattered across the two back-planes. All six + two Noctua fans, dual CPU w/32 GB for each. So, nothing special. I am down to wondering if the thing was defective from the beginning. I think I have narrowed it down to the power supply(s) distribution unit, where all the cables come out to supply power to the MB and back-plane (drives). My logic is that I have replaced the power supplies and it always starts when I unplug it and let the power drain. I am VERY frustrated with this and would love any input/suggestions anyone has as to what to look at next. Sadly there is very little documentation on this unit to help with troubleshooting. Thoughts anyone? Much appreciated!!!! Quote Link to comment
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