"Well, I don't know where to start. A detailed diagram of the entire system 
hookup would help.

Gerald"

Being in active use for ~25 years and hooked to a variety of computers as the 
years have passed, its never been a problem, but the best I could do would be a 
scan of the diagrams I've built it from.  Its very repetitive, four basic 
interface circuit designs repeated 2, 4, 8, 16 times.  But I may get desperate 
enough to do this, eventually.

But it acted as if the power button had been held down and just shut off, and 
there was minimal disturbance to lights (mix of incandescent, CF, and LED) and 
the various USPes around the house, so I'm thinking maybe EMP sensitivity in 
the power controller chip.  Its an old house (built circa 1950), but this 
outlet is one that I ran a 12ga stranded wire straight from the outlet to the 
grounding rod at the service entrance when we first moved in to give me a good 
ground back in the days I did a lot of hardware work -- remember the days of 
wire-wrapped S-100 bus prototypes :)

OTOH, as I've upgraded the security cameras to HD I've reused the SD camera 
wiring to add additional PIR motion detectors, and I just discovered (after 
posting this thread) I'd one added PIR unintentionally powered from a different 
UPS (but they are all on the same breaker and safety ground connection), so 
I'll see if it happens again.  This had been the case for the first 
thunderstorm crash a few months ago as well.

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