How to Factory Reset a Comcast Cable Box
Comcast is the largest provider of cable television services in the United States as of April 2011. Subscribers of Comcast cable access premium TV channels through a provided Comcast cable box and TV remote. The remote controls user settings that include closed captioning, HDMI settings, TV aspect ration, subtitles and TV display capabilities. You can restore the settings to the factory default settings if you no longer wish to use any customized settings.
Press the "Power" button on the front of your Comcast cable box. A green light will illuminate, indicating the cable box is on.
Press the "Power" button and then the "Menu" button on your Comcast remote. The User Settings menu will appear on the TV screen.
Press the "Up" and "Down" arrows on the remote to highlight "Restore Defaults" from the User Settings menu.
Press the "Right" arrow button on the remote. "Restore Default. Press OK to confirm" will appear on your TV screen. Press the "OK" button on your remote. The factory settings are restored. Press the "Exit" button on the remote to exit the menu.