Hello Alyson.dyck

                                SB6190 is just a cable modem so we can check and confirm whether the modem is working fine or not by only checking on direct connection and if the modem works fine and  providing internet, if only the router is not working then you need to hard reset the router and configure on the router settings page for Wi-Fi. But after resetting the modem will go to default setup any custom settings will be removed so use the default network name and password  to connect to your network.