I've had several experiences at home over he years where they said "If we come out and find the problem doesn't exist at the demarc, you will be charged X for a

I've had several experiences at home over he years where they said "If we come out and find the problem doesn't exist at the demarc, you will be charged X for a service call." Maybe that number was $75. In those cases, I just said yes, because it was worth $75 to me to have them test it. And in both cases they identified external wiring issues and rand replacement at no charge. The most recent case was at work, with Comcast Business service, and they identified marginal signal power at our modem, and removed an extra splitter that was in the ceiling of another business. Took them around 4 hours to track down and repair.