Turn the TV on.
Turn on the TV and point the remote directly at the TV. How to Open Service Mode on SAMSUNG UE55KU6500
Press quickly: POWER (to turn off) → INFO → MENU → MUTE → POWER (turn on) Step 3: If that fails, try: SLEEP → P.STD → DISPLAY → POWER Navigating the Service Menu Safely Once inside, you will see several main headings (exact names vary by firmware): Turn the TV on