It is sometimes necessary to "Reset" a cable modem by powering it off and back on again for it to regain a valid IP and network settings.
You may need to restart the cable modem if your home computer is unable to retrieve a valid IP address or there is an interruption in service that is not resolved by checking network settings and restarting your computer. This advice is only applicable if you are using a cable internet provider such as Charter (in the Madison area).
Recycling the cable modem may solve the connectivity issue. To do so:
If you continue to have trouble with your home internet connection after trying these steps, contact your internet service provider for further assistance.