There’s 2 lights on the front of the sbg8300. They both don’t come on?
Did you put it in bridge mode?
Have you tried a factory reset?
General FAQs: SBG8300: LED Light Status (salesforce-sites.com)
Only the online light comes on.
How do you put it bridge mode?
How do you factor reset?
Don’t put it in bridge/modem only mode. that does disable the wifi.
General FAQs: SBG8300: Factory Reset (salesforce-sites.com)
Well after performing the Factory Reset could you let us know the LED light status of the sbg8300 that's the online and Wi-Fi?
Could you also let us know when you purchased the modem? The name of your ISP(Internet Service Provider)
Is this a First-time activation if so have you activated it? by providing HFC MAC ID?