Using the timers. Using the sleep timer Settings General System Manager Time Sleep Timer You can use this function to automatically shut off the TV after a pre-set period of time. You can set the sleep timer for up to 180 minutes after which it will turn off the TV. Turning off the TV using the off timer Settings General System Manager Time Off Timer You can set Off Timer to shut off the TV automatically at a specific time. Off Timer is only available if the Clock has been set.