NETGEAR is aware of a growing number of phone and online scams. To learn how to stay safe click here.
Forum Discussion
Devices connect to c7800 but no web access
Computer, tv, phones and tablets all say connected but have no internet access
Go to the Downloads section above, put in your C7800 model number and download the manual.
In the manual go to the section labeled Troubleshoot with the LEDs. It starts on page 105.
That will get you started.
And if that doesn't work, try asking for help in the section where they talk about cable modem/routers.
If you do go there, you'll have to say a bit more detailed than "it doesn't work".