How to Fix Intermittent Powering Off LG Smart TV

Authored by: Support.com Tech Pro Team

1. Introduction

There are some problems that can cause your LG Smart TV to power off on its own. This guide will attempt to help you resolve the simple ones, so you can get back to the shows you want to watch.

2. Sleep Timer Check

LG TVs can come equipped with one of two versions of operating software. They are commonly referred to as Netcast and webOS. webOS is on most smart televisions made after 2014, while Netcast is more common on older smart televisions and non-smart televisions. Both versions of the software are covered here. You should be able to identify whether your TV has Netcast or webOS based on the screenshots provided.

LG TVs with Netcast

1. Open the Sleep menu.
2. Try the sleep button on your remote.
   

1. If you do not have a Sleep button, try the Settings or Menu button.
   

1. Look for any menus or entries related to Time or Sleep. Make sure these settings are turned off.
   

LG TVs with webOS

1. Push the Home button on your remote.
   

1. Select the Settings gear icon in the top-right corner.
   

1. From the menu on the right, select Sleep Timer.
   

1. Make sure Sleep timer is set to Off.
   

1. Select All Settings at the bottom right.
   

1. Select General > Timers.
   

1. Make sure each timer is set to Off.
   

3. Remotes Check

Make sure all of your remotes are accounted for. Sometimes a simple mislaid remote that ends up with a power button held down can cause this issue.

4. Turn Off

1. Turn it off by pressing the power button.
   

2. Then unplug it from the power outlet.
   

5. Disconnect USB Devices

Look carefully around the back, bottom, and sides of your LG television, and remove any and all USB devices from the ports.

6. Turn On

1. Plug in your Television at the power outlet.
   

1. Make sure the power cable is firmly seated in the back of your television.
2. Press the power button on your television to turn it back on.
   

7. Power Management Check

Power management devices, such as power strips, surge protectors, and power conditioners, wear out over time. This is by design; they take surges so your expensive home theater, video game, and sound system equipment does not.

As power management devices near or exceed their end-of-life usefulness, they can start to have problems providing the right voltages or enough amps to your home theater equipment, such as your Television.

The easiest way to test this is to simply plug your device into the wall, rather than into your power management device. If your device works when plugged into the wall, you will know your power management device has failed and it is time to replace it.

8. What's next?