TO ENTER FACTORY MODE [SERVICE MODE]
- Press the "Menu"
- When the Picture Menu [Brightness & Contrast] reveals,
- Enter code "8500"
Factory mode adjustment screen appears.
Use Up /Dn & Right / Left buttons on the remote control to Select and adjust any item; and to change the data values.
Switch off the Main Power, to exit the service mode.
Some of the factory data is fixed, and cannot be adjustable.