Contact Us

How to Stop Your TV From Randomly Turning Itself On or Off | PCMag

tagsTest Hdmi Extender

Has your smart TV turned on or turned off accidentally? This may be a setting that needs to be adjusted in the TV menu. This is how you can solve this problem.

You were awakened by the sound of talking in the living room. You grab the heaviest frying pan and sneak in, only to find that the TV is on, but no one is watching. Don't worry, this is not a ghost. (Well, this is

If your TV turns on or off randomly, it may be another technology that interferes with TV sleep. This is the solution to the problem.

As with all technologies, before performing any other operations, try to turn it off and then on again. Except in this case, unplug the TV completely, press and hold the power button for 10 seconds, and then plug it in again to see if the problem persists. 

If you are using a surge protector, try plugging it directly into a wall outlet to eliminate the danger of it as a potential variable. If it is plugged into the wall, try another power outlet, preferably one that is not connected to the switch. In this case, you may also need to plug it into a surge protector.

If I were a bookmaker, I would spend my money on HDMI-CEC, which is the culprit of your power failure. CEC, or

, Is a function that allows your devices to control each other through HDMI. For example, when you turn on the PlayStation, CEC can automatically turn on the TV and switch it to the correct input without having to grab another remote control. This can be very convenient, but if the behavior is abnormal, it means that the TV will turn on and off due to a misunderstood signal. 

Open the TV's settings and disable CEC to see if it can solve the problem. Some manufacturers have their own CEC brand names (Sony called Bravia Sync, Samsung called Anynet+, LG called SimpLink), so you might have to check the settings on your TV around Google. If this solves the problem, but you still want to use CEC, you must start disabling CEC on other devices until you find which device is sending random signals.

Ironically, the "smart" features of many TVs often make them seem a little clumsy. If your TV is connected to another TV

(Such as SmartThings, Alexa, Google Home or Logitech Harmony), certain routine or other automated operations may accidentally turn on or turn off the TV's power. If your TV has a built-in "broadcast" function, your phone can even turn it on every time you try to watch a YouTube video.

Before browsing each application, please open the settings of the TV and disconnect it from Wi-Fi for a few days. If the smart services cannot connect, they will not be able to send these unexpected signals. If turning off Wi-Fi solves the problem, you may have to start researching other smart apps and devices to see if they are often confused with your TV.

Many modern TVs have built-in features that allow you to turn the TV on or off at specific times of the day. If you find that the TV is turned on or off at the same time as the clockwork, it may have been accidentally set by a child or cat sitting on the remote control. Browse around in the TV’s settings to see if you can find the power scheduling feature and make sure it is disabled.

If the battery of your remote control is low, it may send out wrong signals when the power supply fluctuates. Try replacing the new battery with the remote control to see if the problem can be solved. When using, please clean the buttons well. If the power button has been sticky since then, you will spill soda water everywhere. This may be as simple as pressing the button and turning off the TV.

Although most TVs should not interfere with each other, similar brands of TVs can easily intercept each other's remote commands if they are nearby. For example, if you have a Vizio in the living room and a Vizio in a room throughout the hall, the remote signal from one room may affect the TV in another room. 

You might even have a neighbor who uses a universal remote to send a compatible code to your next-door TV. This is rare, but it can happen. (I have even heard stories of direct sunlight streaming through the window, confusing the infrared sensor and turning on the TV, although I have never experienced it myself.)

When you press the power button, many modern TVs will not completely turn off their power. Instead, they enter a low-power sleep state, which allows them to use many of the above features (for example, turn on when someone casts a YouTube video from a mobile phone). 

If you can’t seem to solve the problem, you can try to enable the TV’s "energy saving mode". The name of each brand may be different, but in fact, when you finish watching the TV, it will turn off the TV completely. Some built-in functions may be lost, but it should at least bring you some peace when solving the problem. You can also check the eco mode on your computer

Or other devices, because they may send signals to the TV when they enter sleep mode.

Again, as with all technologies, sometimes these problems are software bugs fixed by simple updates. However, I listed this at the end, because TV firmware updates can sometimes cause problems on their own-therefore, updates are only recommended when absolutely necessary. 

If you don’t find the source of the problem, please go to the TV’s settings to see if there is a firmware update available. Some TVs may require you to install it manually using a flash drive, in this case, check the manufacturer’s support website to see if they have released an update for your model.

Finally, if any other method does not work, it may be time to reset the nuclear waste and reset the TV to factory settings. Regardless of the setting that caused the problem, it should be restored to the default setting. Just make sure that if you plan to change the settings again, you can change them again and again within a few days. This way, if the problem starts again, you will know exactly which setting caused it.

If restoring the factory settings does not work, please contact the manufacturer's support department. There may be a known bug or hardware problem with your TV model, and a technician may be able to solve the problem once and for all.


Whitson Gordon (Whitson Gordon) is a writer, gamer and tech nerd, he has been engaged in PC development for ten years. He eats potato chips with chopsticks, so there is no grease on his mechanical keyboard. Connect with him on Twitter @WhitsonGordon.

sign up

Send our popular stories to your inbox every morning

This newsletter may contain advertisements, deals or affiliate links. By subscribing to the newsletter, you agree to our


. You can unsubscribe from the newsletter at any time.

Your subscription has been confirmed. Please pay close attention to your inbox! is a leading authority in the field of technology, providing independent reviews of the latest products and services based on the laboratory. Our professional industry analysis and practical solutions can help you make better purchasing decisions and get more benefits from technology.

©1996-2021 Ziff Davis, LLC. PCMag Digital Group

PCMag, and PC Magazine are federally registered trademarks of Ziff Davis, LLC and may not be used by third parties without express permission. The third-party trademarks and product names displayed on this website do not necessarily indicate any affiliation or endorsement with PCMag. If you click on an affiliate link and purchase a product or service, the merchant may charge us.