From the list you noted of stuff that blinks off it sounds like you might have a weak “pole.” The power to your house is most likely “two pole,” meaning it’s 120/240 volts. The things that use 120 volts are running off one pole-to-ground. The things that use 240 use both “lines” to add up to 240 volts. Are any of your 240 volt appliance being temperamental?
What you’re describing doesn’t sound like the power company. Does your house have aluminum wires from the pole to the main breaker? These can corrode over time and when one line starts to oxidize then one pole can get “blinky” before it goes off. Is your electric water heater getting as hot as normal? If not, that’s an indicator.
After checking your outside supply lines try switching one of the appliances you noted to the other side of the house. You might need to check some of the voltages at the outlets you are seeing blink off? Figure out which breaker in your distribution panel supplies the things that blink off. Flip it once and note how it acts. Breakers do get tired and sometimes contacts get mungy and do odd things.
If the problem is not local just sue the power company———
Wow, if I didn’t already think the world of my fellow FReepers, I sure do now. To all of you who gave me the benefit of your knowledge, a huge THANK YOU.
I don’t know if the wires going from the pole to the main breaker are aluminum or not, but these temp off-and-on events seem to occur between around 1:00 p.m. and 4:00 p.m. (what OG&E considers “peak” hours). The idea about running a cord from my computer to the other side of the house is a good one, which I think would be worthwhile to try.
I’ve read a little about the 120 / 240 “two pole” thing, and the fact that the bumps are always “partials” makes me lean toward that explanation. Most importantly, it’s not just my house; it happens to the entire town. Very weird.
Sincere thanks again to everybody. Too many to name individually in the “Reply to” space, LOL