I have been using this cable modem for about a year now. We lost our Internet access last Friday. This is our own modem (not rented from Comcast).
There is a light at the front of the device labeled "Online" which is currently staying off. According to the manual, that means "IP registration is unsuccessful."
Called Comcast twice (different reps) and both the times they said that they are not able to access (see) the modem and that the device has failed. My options are either to buy a new modem or rent one from them at $3 per month.
Power, Receive, and Send lights are on. Is there any way to ensure that the modem has really failed (without relying on what Comcast people are saying)?
Thank you very much for your time.