My ISP is cable. Called and said they needed in my house to find the source of the signal that was affecting everyone else in my neighborhood. Literally nothing had changed and my house has been connected since 2010.
The tech arrived and I had them start outside. He replaced every connection/coupling and kept testing. After all of them were replaced, his testing machine showed a perfect signal. Noise eliminated. I was not charged for this service.
I found this baffling. My neighbor’s coax connections affect me?
I had this same thing happen to me for the first time a few months ago. It was my fault because I had done some changing and it was just a not fully right cable connection in my basement. They had been going up the line to each house to isolate to noise my connection was feeding back in.