Great to hear! So, in a round about way, it probably was a power issue, just not in the way we would think. With everything having been replaced it was the only thing I could think of that could still be causing it. Well, that and Gremlins. You've got to watch out for those critters! 😛
Many years ago, when I was living in Virginia, I came back to Western NY to visit my folks. On my return trip to Virginia my car's electrical system started having major issues, including with the windshield wipers, and it was absolutely pouring at the time. I managed to make it back to my folks, as I had only driven about 20 miles when it happened, and we called a local auto shop.
When they checked the car, they figured out that it was the control module, so they ordered a new one, which a local Ford dealer actually had (it was an '82 Mercury Lynx). Well, I was fiddling around while they were waiting for the module to be delivered and I found that the negative wire going from the battery to the car body was loose at the body's connection. I asked for a small wrench and tightened the little bolt. Problem solved. It wasn't the control module after all, and I was glad, as it was going to cost a pretty penny. A loose wire connection was messing so much up.
I also found an outlet a couple of years ago that was having fluctuating power. I found that a connection in a light fixture in the basement, which was inline on that particular leg of power, was loose. Somebody had used electrical tape instead of a wire nut, and the wires were just loose enough from each other that it would cause the power to fluctuate just a little. It was enough to cause issues with my DirecTV Genie, though. It was an easy fix, luckily, with just putting wire nut on the connection.
Again, I'm glad the problem is solved. 🙂 Still, watch out for these guys, cuz you never know....
