Sounds like you're stuck on..... Video 1 or Video 2 (whichever). If you can access your TV's
menu at the front panel, you should be able to switch over fairly easy. Hit MENU. Using your VOLUME UP & DOWN buttons, Go to CABLE/SATELITE/ANTENNA, hit VOLUME UP or DOWN 'til it switches back to TV
picture then hit ENTER. If you do not have an access panel in front but possibly have any other remote (cable or satelite or home theater, etc...) that can be paired with this TV and has an INPUT button, you can change the setting that way.
Hope this info was helpful. Good Luck!