HOW TO ENTER SERVICE MODE TO SAMSUNG METALLICA CS-21C3 _ PLANO CS-21A8 KS-2A CHASIS
If you have its factory remote control: Press [PICTURE ON => DISPLAY => FACTORY] If you haven't the factory remote control: Press [STANDBY => DISPLAY => MENU => MUTE => POWER ON] Service menu will be displayed. To exit from service menu, power OFF the set.