That error message means you have a signal deficiency on the frequencies those channels are on.
If you have triple checked all of your connections and removed any unnecessary splitters, you should probably contact Comcast and have them send a tech out.
Squeeks-Tater wrote:Funny mine started while I was on vacation this past weekend. No one touched my cable. If it's your cable how do I get all 180 other channels? Also, in addition to the Memphis area NBC channels 5 and 805 HD, I now have a 1005 NBC HD. Ditto for WGN, ABC, CBS, ION, and PBS.