This is a very common thing I see. Maybe its the full moon. Who knows. But from time to time there is a rash of “my modem no longer works or has a hard time connecting”. This could very likely be due to a simple fact. When it gets really hot really suddenly coupled with electrical storms electronics can get, shall we say, hinky.
At least that’s the technical term for it AFAIK. Now, it must be human nature that whenever electronics that you don’t understand in the first place start acting up you just have to poke at them. The favorite method seems to be to randomly change things and then feign ignorance.
Tech: “Did you do anything recently?”
Cust: “No, it was always like that.”
Tech: “Are you sure, we usually don’t attach the television to the microwave.”
Cust: “Nope, been like that for years. It used to work great!”
OK, I’m not here to throw stones, I’m going to try and help you avoid simple problems with your cable modem that I see over and over (and over) again.