Why Does Your Smart TV Switch Inputs By Itself?(With Fixes)

Your smart TV may be changing inputs by itself for a couple of reasons, including remote malfunction, your TV being exposed to sunlight, dust accumulation on the motherboard, damaged cables and CEC is enabled.

Not to worry, however, as these problems can all be fixed.

If I were you, I’d start with a simple TV reset, you can learn how to do that in the article.

Then come back and try the rest of the solutions.

This article will discuss why your smart TV may be switching inputs by itself. So keep reading! I have everything you need to know about why your smart TV may be changing its input by itself. 

Why This Happens?

There is no better feeling than getting home after a long day and having a little time to yourself in which to watch the latest episode of your favorite TV show.

However, nothing is worse than getting to an important part of the show, only for the input to change suddenly without any action on your behalf. 

If your smart TV is changing its input by itself, don’t worry, you’re not the only person this has happened to.

Many people have asked themselves why this happens.

There are a few reasons for that, and they will be listed below:

1. Remote Malfunction

One of the most common reasons your Smart TV is changing the input without any action on your behalf is a problem with your remote control.

Your remote may have a circuit connection problem, which will cause your TV to receive random signals. 

2. Overheating

The next reason why your Smart TV may be switching input by itself may be because your TV is positioned where direct sunlight hits the IR receiver.

This will cause your TV to receive random signals, such as input changes. 

The same applies if your TV is located to any other source of heat, like a radiator.

3. Dust Issues

If the back of your Smart TV is covered in dust, and you remove the back panel to find it like an abandoned warehouse, this may cause your TV’s input to malfunction.

A build-up of dust can alter some of your TV’s inputs, causing it to randomly change to an alternative input as you’re watching your favorite shows.

4. CEC – Consumer Electronics Control Is Enabled

The fourth primary reason your Smart TV is switching inputs by itself may be because CEC or consumer electronics control is enabled.

If the sources are powered ON, this is intended to make the setup process easy, yet this can cause your TV’s input to change randomly. 

How To Fix This Problem

So now that we’ve gone over some of the primary reasons why your Smart TV is switching sources randomly, we will review some ways to fix these problems. 

1. Remote Malfunction 

If you believe that your remote is the cause behind the random switching of your Smart TV inputs, there are a few things that you can try to fix this problem.

First off, make sure none of the buttons on your remote are stuck, and if it is, try to free it using q-tips and alcohol.

Tip: I recommend taking the batteries out, give your remote a good shake(in case there is any dust stuck inside), and press each button on the remote a few times.

Another quick and easy idea is to remove the batteries from your remote and swap them out for some new ones, as this is a common cause of this problem.

If this doesn’t solve your situation, you may want to invest in a new remote, which may sort out your problem.

2. Overheating

If you’ve noticed that your Smart TV is in a position where it gets hit by sunlight or any other source of heat when you’re watching some of your favorite shows, it may be easy to combat this problem by simply repositioning your TV so that it doesn’t get hit with regular sunlight.

3. Too Much Dust

If you’ve noticed that your smart TV has acquired a large amount of dust around the back of its paneling, you will need to remove this panel to give it a thorough clean.

This can be done using wipes and a blow-dryer. If this doesn’t work, replacing the motherboard is a good idea.

Tip: This issue can also happen because some of the cables are not properly plugged in or simply damaged/burnt. While you are cleaning the dust, please make sure all the cables are in working condition and are firmly plugged in.

4. HDMI-CEC Is Enabled

If you’ve tried all the other options and your Smart TV is still randomly switching from input to input without action on your behalf, it may be because your CEC is enabled.

This can be solved quickly by simply going into your Settings, searching for the CEC settings, and turning off the automatic switch. 

HDMI-CEC feature has different names when it comes to different TV brands.

If you have LG TV, you will need to disable the feature called SIMPLINK.

For Samsung, go ahead and check that Anynet+ feature is disabled.

For Sony, you will need to check the Bravia Sync feature.

Tip: If your TV has an Auto Input Detection feature, I suggest you try turning it off. You can usually locate this option through the Settings.

Alternative Problems and How to Fix Them

If none of the above problems are behind your TV’s input malfunction, here are two further issues that may lead to your TV changing its input by itself.

1. Soft Reset Your TV

While this may seem too good to be true, a simple way to stop your Smart TV from randomly switching sources is to restart it.

You should aim to turn your TV off with the power button first, pull out the plug and wait a few minutes before plugging the cable back into the power source.

Believe me, it can solve almost any TV-related issue.

2. Remove Wireless Devices Away From TV

The following solution is a rare instance, but on rare occasions, infrared devices near your Smart TV may interfere with the input signal.

To test whether this is the problem, move any of these infrared devices away from your TV, and if it stops randomly changing its input, you know that was the source of the problem.

3. Pending Software Update

This is quite a rare occasion, since most modern TVs install all the updated automatically once they become available.

But we all know that sometimes smart features can malfunction, that’s why I’ve decided to still include this point.

Simply open the Settings in your TV, find the Updates section, and check if there is any update available.


One common question regarding smart TVs I did my best to answer was connected with inputs seemingly switching by themselves. 

Let’s sum it all up. First and foremost, you should soft reset your TV. Turn it off, unplug it from the power source, wait for 1-2 minutes, plug it back in. 

If that didn’t help, check the TV’s settings and make sure HDMI-CEC feature is turned off.

Then you can proceed with the rest of the tips given in the article. If none of them help, I’m afraid you will need to contact a professional for some assistance.

Hope this article solved your problem.