Maybe I'm misunderstanding the wording, but didn't the monitor's weird actions begin at the moment of power loss?
Yes you are correct, this happened right at power loss.
On an update my wife said it happened again yesterday; shie heard a boom followed by the lights going very dim, just as they had done the earlier day. It was dark outside and she said the bulbs were producing very little light.
Then she heard another boom (more audiable than the first one) and then the lights went completely dead. She looked out the window and saw utility trucks down the street and a bunch of folks come out to see what the ruckus was all about.
We have no phone poles in our subdivision, I'm guessing it was one of them green boxes on the side of the road....
