Write down all values data before make any change.
Press Volume down button, Hold down the button ON THE PLASMA TV.
Press three times the RECALL button on remote control.
The Service Menu mode will comes up.
To navigate main menu Use {1} {2} on remote control.
To navigate sub-menu Use {3} {4} on remote control items.
To change item value Use {VOL+} {VOL -} on remote control.
To save Turn off Power to exit service mode.