Hi Frederickjp,

Although it seems like the modem can connect to Wi-Fi, the following things should be checked:

• If you recently bought the modem, have you activated it by giving your ISP (Internet Service Provider) the HFC MAC ID?
• Please let us know if the modem's LED lights are on. Power/Send/Receive/Online/Wireless 2.4GHz and 5GHz bands steady or flashing?
• Reset the modem, then confirm that you can connect to the internet.
• If you are still unable to access the internet
• Contact your ISP to perform a Re-Provision (delete HFC MAC ID and add it back) on the modem
• Also, be sure to:
• Placing your gateway in the center of your home 
• Do not place it behind any appliances or electronics.
• Don’t put it too close to cordless phones (landline not cell), baby monitors, or your microwave
• Make sure it’s not behind a metal or concrete wall as the signal has a hard time going through them, If any of this was helpful or if you have any questions, please let me know.
• To do a Reset click the below link: 
• http://arris.force.com/consumers/articles/General_FAQs/SBG10-Factory-Reset