Why Is My LG TV HDMI Not Working? (6 Effective Solutions)

Lindsay Hayes

If you realize that the HDMI connection on your LG TV isn't working properly, there are a few culprits. It could be an issue with the HDMI cable or HDMI port you're using. You may also have selected the wrong HDMI input from the TV. In the worst case, it could be because your LG TV motherboard is faulty. The good thing is that there are many ways to fix this.

My brother came to me saying that his video game console was not showing on his LG TV anymore. The TV was complaining of no HDMI signal and he needed my help getting it to work again. He doesn't live too far away, so I went over, tried a few trusted fixes, and finally found what the problem was.

If you're facing a similar issue with your LG TV HDMI not working, you shouldn't stress yourself out. This guide will make things easy for you. Let's get into everything that you need to know.


Why Isn't My HDMI Working on My LG TV?

Are you trying to use devices connected to your LG TV but there seems to be something wrong with the HDMI connection?

Many people with LG TVs face this issue when they've had them for some time. There are a few common reasons why this happens, and once you know why, it makes it easier to fix.

The sections below outline the most likely reasons why LG TVs have these HDMI issues.

Pair of HDMI Cable

You're Connected to the Wrong Input

You'd be surprised by how many people think something is wrong with their TV HDMI because they set the TV's HDMI input source to the wrong one.

This can happen because pretty much all modern LG television models have more than one HDMI port. So, while the TV is set to HDMI, it might not be set to display what's coming from the right HDMI port.

TV OS Is Having a Software Issue

This is likely to happen if you have an LG smart TV. The software in these TVs is a lot more complex than what you'll find in the regular LG television models.

Even though it isn't too common, it means that the operating system in the LG TV is more prone to having software issues that can potentially affect the HDMI connection.

HDMI Cable Isn't Well Connected

In some instances, your LG TV might be unable to detect your connected devices because the HDMI cable is faulty or poorly connected.

If you don't have a stable HDMI connection and the image on the screen jitters or changes quality a lot, this is also a likely culprit.

HDMI Port is Faulty

Your LG TV's HDMI port is responsible for receiving the signals sent out by the connected devices.

When you have a faulty HDMI port on your LG television, your TV will have a hard time accepting HDMI inputs, if it is able to at all.

TV's Motherboard is Damaged

The motherboard is the large circuit board inside your LG TV that is responsible for handling essentially all of its functionality.

When something on your motherboard gets damaged or a component short-circuits, it can affect how your LG TV is able to recognize HDMI devices connected to it.

How to Fix LG TV HDMI?

If your TV shows a message saying it doesn't have an HDMI signal despite there being a device plugged into it, there are a few fixes you can try out to get things working again.

Woman Plug an HDMI Cable into a TV

1. Make Sure to Select the Right HDMI Input

It might seem rather obvious, but since most modern LG televisions come with multiple HDMI ports, make sure that the TV has been set to accept HDMI input from the right HDMI port.

The good thing is that you can change which of the HDMI ports your TV's video interface is set to, with just a few taps of your remote.

  1. From the remote control for your LG TV, look for the "Source" or "Input" button. Press it.
  2. This will bring up a menu on your screen with the different input sources that your LG TV has.
  3. On some TVs, only some of the sources will be highlighted, which indicates the ports that have a device connected to them. Look between the HDMI options and choose whichever one is highlighted. If your LG TV doesn't have this feature, you can simply check the back of the TV for the number beside the HDMI port that the device is plugged into.

Your TV should switch to the new input and hopefully display the output from the connected device.

2. Power Cycle Your LG TV

Sometimes, your HDMI connections don't work simply because of a minor software glitch. A lot of the time, all you really need to do is power cycle the LG TV. This is the equivalent of doing a hard restart.

To power cycle your TV, just follow the steps below:

  1. Unplug the power cable of your LG TV from the wall outlet.
  2. Wait for about a minute.
  3. Plug the power cable back in.
  4. Turn on the TV and see if the TV can see the HDMI device now.

3. Try a Different HDMI Cable

The cables in modern devices typically contain many smaller cables that are prone to wear and tear, especially with all the bending that they go through.

It's always a good idea to try different HDMI cables if you realize that your LG TV isn't recognizing a specific HDMI device. It might simply be that your HDMI cable is faulty.

If you don't have any spare HDMI cables at home, I recommend that you buy this one. Once you get it, unplug the other one from both the TV and the connecting device, and put this in its place.

4. Try a Different HDMI Port

While the HDMI cable can frequently be the culprit in situations like this, you shouldn't rule out the HDMI port.

When your HDMI port is filled with debris, has been shorted out, or simply been damaged in some other way, it probably won't work no matter how hard you try.

You can check HDMI port and see whether there's any visible damage. If there's debris in it, you can attempt to clean it out with a toothpick or toothbrush.

However, since most LG TV models come with additional HDMI ports, I recommend unplugging the HDMI wire from its current position and putting it into another HDMI port.

5. Change the Resolution of the Connected Device

If the maximum resolution of your LG TV and the resolution settings of the device you are attempting to connect to it are not compatible, you will likely get a "No HDMI Signal" message on your TV screen.

This is because your LG TV simply won't be able to display a resolution higher than what its hardware is capable of.

Essentially any LG TV with HDMI that you buy today will support Full HD resolution, but not all will be able to play Ultra HD or 4K content. If your game consoles, cable box, or Blu-Ray player is set to output higher than that, the HDMI link will have issues.

To fix this problem, go to the resolution settings or video output settings of the device that you have connected to. Either set it to "Auto" so that it detects the resolution of your LG unit, or set it manually to the resolution of your television.

How you do this will depend on the exact device you have connected to. You can check its manual or search for the right steps online.

6. Take the TV in for Repairing

If your TV's HDMI functions still don't work after all this, the problem is likely to be due to a faulty motherboard, especially if the TV works fine otherwise.

I don't recommend that you replace your motherboard yourself, even if you can get an official replacement board from an LG supplier.

Instead, you should request a repair or check LG's website for the close authorized repair center near you.

This way, you're sure to get the best service possible and be confident that the HDMI display will work.

Installing Mount TV on the Wall

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Final Words

If your LG TV's HDMI link isn't working when you connect it to other devices, it might be due to the HDMI port, the cable, certain software settings, or a bad motherboard. Sometimes, you might simply have not connected to the right input source!

If you're facing this issue with your HDMI link, simply replacing the HDMI cables or plugging them into another HDMI port can help. You might also want to unplug the TV from power for a minute before plugging it back in or change the video output settings on the other device. If all else fails, take it to an LG repair center.

Did this article show you why LG televisions occasionally can't connect to HDMI devices and how to fix it? If so, take a look at our related articles for more information.

Lindsay Hayes

Hi, I’m Lindsay, a techie from Kansas City. That’s right; I’m a born and bred Midwesterner. I learned to take electronics apart at my dad’s GameStop way back when, and I haven’t stopped since. I spend most of my time checking out new gadgets.
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