Router stopped transmitting internet connection

[Jloun320]

We have been living in our Lennar home for about 5 years and recently spectrum sent us a new modem. After switching out a modem and connecting to the ruckus the signal shows up but we were not actually connected to the internet. We power cycled multiple times and checked connection with no success. We plugged it into the router that spectrum supplied and it’s working fine currently but we would prefer to have the ruckus back.