Reset the picture, sound and ambilight settings
1. Press the SETTINGS button on your remote.
2. Scroll to All Settings and press OK.
3. Scroll to General Settings and press OK.
4. Scroll to Factory settings and press OK.
5. Scroll to OK and press the OK button.
6. The picture, sound and ambilight settings of the TV are now reset to the factory defaults. Press TV Exit to return to TV mode.