1. Make sure that you have activated your Internet Service with your Internet Service Provider. To activate your Internet service, visit your cable Internet provider’s website and follow the instructions to activate your Internet service.
2. Check that the coaxial cable connections are secure at the modem and at the coax outlet.
3. Check the Ethernet connections are secure at the modem and at the computers’ Ethernet port.
4. Power off your modem for at least 10 seconds and then power it back on.
5. Restart your computer or router connected to the cable modem. This ensures that they receive a correct IP address from the modem.