Surfboard died. Swapped it and they gave me a new RCA Thomson. Ran the registration for existing customers and i stopped at the last page. Different errors each time I tried. After sitting on the phone for an hour, Comcast says they could see modem, could ping it, I could ping yahoo, but could clear registration mode.
They told me to swap it again. Got another RCA Thomson and exactly the same problem happened.
So far, I haven't called again. Haven't had a spare hour at one time. Anyone have any ideas?