I have a different type of service but I’m going to guess that they probably don’t need to do anything, especially not inside the house. I ended up having to get them to come out after trying the same thing. There’s a utility closet in my apartment complex and it turned out my connection in there wasn’t hooked up. You might try searching the Time Warner forums. I remember reading on there that customer service will often tell you something requires a “truck roll” when it actually doesn’t.