FYI If anyone wants to know...
If you are doing electrical work while renovating, and arc a couple wires causing a breaker to flip, check your S9's as for some strange reason it stopped hashing. It was on a different circuit, was still on, but showed 0.00 TH/s A reboot fixed it.
Very sensitive thing. Maybe this is why others are having issues due to power fluctuations in thier neighborhoods. Just an idea.
ZzzZZzAaaaapppp
I've had issues with several S9s doing the same thing after power blips/spikes. They'll show "Elapsed Time" as if they're running fine (no reboot) and the chips will actually stay normal temps. Just no hash.