Samsung 400UXN - Manual (Page 81)

On Timer
Turns the LCD Display on automatically at a preset time. Controls the mode and the volume level at
the time the LCD Display turns on automatically.
MENU → , → ENTER → , → ENTER → , → ENTER → , → , → ENTER
Off Timer
Turns the LCD Display off automatically at a preset time.
MENU → , → ENTER → , → ENTER → , → ENTER → , → , → ENTER
Adjusting the LCD Display