I have done everything that has been suggested in these comments and the Arris Surfboard app will still not accept my login username and password
Username/password invalid surfboard app- SBG8300
In this case for one last time you can perform hard reset on the modem by following the steps mentioned on the below article and uninstall the app then wait for the modem reboot completely and then connect device to your modem WIFI network then install the surfboard central app and setup. 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. If still same issue persist please reach out arris.com/consumersupport for further assistance if the modem is under warranty.
http://arris.force.com/consumers/articles/General_FAQs/SBG8300-Factory-Reset
http://arris.force.com/consumers/articles/General_FAQs/SURFboard-Central-Wi-Fi-Cable-Modem-Setup
Login to the community
No account yet? Create an account
Enter your E-mail address. We'll send you an e-mail with instructions to reset your password.