Can not make my airport extreme connect to internet
Can not get wireless internet connection. Yesterday modem would not connect over hard wire, cox cable man came out and delivered a new modem that allows me to connect over ethernet but can not get internet wifi connection that I have had for several years. I have an airport extreme and a airport time capsule. both were green this am before new modem connected. but neither can be located with airport utility on iMac or MacBook pro.
iMac, macOS 10.13