If your Wi-Fi is not working but you can access the internet when you connect to your modem with an ethernet cable (this is the cable you’d use to plug your PC, PlayStation or other consoles into your modem), it may be because your modem has Wi-Fi turned off.
You should find your Wi-Fi button on the top, front or side panel of your modem, depending on the model. You’ll know it’s turned on if the light is green.
If your Wi-Fi is turned on and you're still unable to connect, the issue may be the internet connection. See below for internet troubleshooting steps.