Peter fixed my wireless network yesterday.
The problem was that rebooting the cable modem wasn’t sufficient to provision the IP address for the router.
I have phone service through the cable company, and the modem has a backup battery to keep the service from dropping in the event of a power outage. What the Comcast installer failed to tell me, but Peter figured out, is that the modem’s battery, as well as the power supply, has to be disconnected to reset the IP address.
Once that was done, Peter reconfigured my wireless devices, and now everything is sailing along.
Thank goodness.