LG tv hdmi not working – full troubleshooting guide

Are you receiving a NO Signal message every time you turn on your LG TV? This could be due to a problem with HDMI. The LG TV HDMI not working issue is not a new thing. Thousands of users have faced this issue, and everyone needs a reliable solution. 

So, that’s why we prepared a step-by-step guide that will help you first troubleshoot the issues with your TV’s HDMI port or cable and then teach you how you can solve them.

LG TV HDMI Not Working – Troubleshooting & Solutions

LG TV HDMI not working issue can happen due to several reasons. It could happen due to a damaged HDMI port or cable, software issue, or anything else. So, to fix your TV, you will need to first understand the issue behind the problem. Is there a problem with the cable, the device, or maybe something else? Although it sounds like science fiction at first, you can probably fix it yourself.

So, here are some methods that you can follow to troubleshoot and solve the problem successfully. 

Switch Input

Sometimes the issue could be with the input source that is active on the TV. You may have activated the wrong input source that is not connected to the HDMI cable; that is why you are receiving the No Signal message. Before you do anything else, you should try connecting the other devices to your LG TV. Also, you may attempt to connect the same device to a different TV. The problem could be caused by the other device.

After you do that, here are the steps to switch input ports with the help of your TV remote: 

  1. Press the Input or Source button on the remote, and you will see different ports. 
  2. Select the different HDMI ports and see if the port works. It often happens that some port is inoperative and therefore your TV does not respond to HDMI. Every TV has several different HDMI ports, so don’t give up if the first one doesn’t work. Try each of them.

If your remote doesn’t have an Input or Source button, proceed to the following method:

  1. Press the home button
  2. Go to the upper right corner of the TV, and you will see the Input/Source option. 
  3. Go into the option and switch between different input sources. You have to change the input to HDMI and confirm it.

This will probably solve the issue, and the HDMI port will start working. If this doesn’t work, this means there are other issues. So, you will have to move on to the next step.

Connect Another Device to the TV

Now you will have to check that the ports on your TV are okay and are not damaged. For this, you will have to connect another device through the HDMI port. You can connect your phone, tablet, or any other device through an HDMI cable. Connect your Miracast receiver to your TV using an HDMI cable and a USB cable if you want to connect Android phone or tablet. Then, turn on the device and select HDMI mode from the list.

Things work a little bit differently for PC and laptops. You should go to Settings > Devices. Then click Add Bluetooth or Other Device > Bluetooth and Other Devices. Select Add a Device in the dialog box that appears. Finally, choose LG TV and wait for confirmation.

If the device successfully connects with the TV, this means the ports are working fine, and there is a problem with the HDMI cable. 

Check HDMI Cable

If the ports on your TV are working fine with other devices, this means your HDMI cable could be damaged. So, you will have to examine and check the HDMI cable thoroughly. 

Follow the steps below which will help you: 

Connect to Another Port

First of all, try your HDMI cable with another TV port. If it works with another port, this means the cable is okay.  The best option is to test the cable on another LG TV but it is not necessary if you don’t have it. You can also try it on a laptop or other compatible device.

If it doesn’t work on another port, this means that the cable is damaged.

Replace HDMI Cable

If the above solution doesn’t work for you, then you will have to replace the HDMI cable with a new one. You can buy a good quality HDMI Cable on Amazon

Check Resolution Settings

If replacing the HDMI cable doesn’t solve the issue, this means that the problem might be with the TV settings. Sometimes, you unintentionally change the resolution setting, which can cause an issue. Keep in mind that the resolution of your TV can range from 420p to 4k or even higher. 

The resolution of the connected device has to match your TV.

So, you will have to check the resolution setting and set it according to the capacity or specification of your HDMI cable. 

Inspect Pins

Sometimes, the problem could be with the HDMI port of the cable when you incorrectly plug the HDMI cable into the TV. So, you will have to closely inspect the HDMI port’s pins and plug in the cable accordingly. 

Check for Damage

Sometimes, ports get damaged when the HDMI cable is plugged in., So you will have to look for damage inside the port. If you feel any folded pins or any other physical damage, this means you will have to replace the cable.

HDMI Cable
HDMI Cable

Check Power Supply

The HDMI not working issue could be due to the wrong power supply adapter. If it has been unplugged recently, or if the power cord has become frayed or damaged, that may be causing the HDMI ports to not work. Also, some HDMI cables can require more power than the HDMI source device’s minimum power supply. A source device that supports HDMI can provide more power and indicate this capability to the cable.

If you see any damage to the power supply cord or adapter, you will have to replace it with a new one. 

Check for Software Updates

Sometimes, you replace the HDMI cable with a new one, and your TV doesn’t recognize it because the system needs software updates. If you want to keep watching channels or get better service, you always need an update. If your TV warns you, do not just close the tab. Make the update. Some updates include things like improving energy efficiency or HDMI compatibility.

So, the first step is to check for software updates that could fix the problem. 

The following are steps that you can follow:

  1. Press the Home button on your remote.
  2. Use the directional arrows to go to Settings and press Enter.
  3. Go to All Settings and press Enter.
  4. Go to General and press Enter.
  5. Go to About This TV and press Enter.
  6. Go to Check For Update and press Enter. An update usually takes a few seconds to several minutes, depending on your home connection speed, and involves a TV restart. 

If you see any available updates, go for it. This will probably solve the issue, and your TV will be working fine. 

Reset HDMI Port

If updating the software doesn’t work for you and you are having trouble with your HDMI ports on your LG TV, you will have to try resetting the device. Resetting does not mean returning to factory settings. Restoring the factory settings erases the data and settings of the TV as well as all installed applications.

Below are the steps to reset the HDMI port:

  1. Turn off your TV and unplug it from its power source.
  2. Let it sit for at least 10 minutes.
  3. Plug your TV back in and turn it on. After the TV turns on, try the whole procedure again. Select HDMI Input in Settings and plug the cable in.

This will reset the connection between your HDMI ports and cable boxes, gaming consoles, and other devices connected to them.

Faulty Motherboard

Sometimes, the HDMI port on the LG TV stops responding due to a fault in the motherboard. Many customers replace the motherboard and fix their problems this way. But, before removing the board, first, locate an OEM part from an LG supplier that corresponds to your TV. 

After that, you need to try the following steps to resolve this issue:

  1. Press and hold the power button on your TV for at least five seconds.
  2. Unplug the power cord of your TV from the outlet and wait for at least five minutes.
  3. Plug in the power cord again, and turn on your TV by pressing the power button on the remote control of your TV.
  4. Check if you are able to connect with the HDMI port on your TV; if yes, then no further action is required. If not, you can proceed with step 5.
  5. Check your HDMI cable and make sure it is properly connected to both sides of an external device such as a computer or set-top box and an HDMI port on the TV.
  6. If everything is fine and there is no physical damage to the port, this means that the problem is something else, and you can move on to the next solution.

Disconnect Amplifier

If you are using an HDMI switch that connects both the HDMI device and amplifier, this could be the problem. Sometimes a third device’s connection between a TV and a device can cause connection issues that result in a No Signal issue on the LG TV. Think about consulting the manual for your AV amplifier to ensure that the connections are properly set. Also, verify that the input on your amplifier reflects the input on your TV.

The following are the steps that you can follow:

  1. Turn off the TV and disconnect the power cord.
  2. Now, unplug the HDMI switch from the TV and also unplug the amplifier connection.
  3. Now, wait for a few minutes and plug the switch back into the TV.
  4. This will solve the issue, and the HDMI port will start working again. Alternatively, you can turn off the amplifier completely and connect the video interface directly to the HDMI input. Sometimes the problem lies in a faulty amplifier. This usually happens if you connect an analog connection to an A / V receiver. 

If this works for you, this means that you can’t connect your amplifier with the HDMI switch.

Hard Reset the TV

If you have tried all the solutions mentioned above and still have the same issue, you might need to Hard Reset your TV. This will fix many problems with your television’s settings, but it will erase all data from your TV, including applications you have installed and settings you have configured in the menu.

The following are the steps that you can take to successfully hard reset your LG TV:

  1. Turn off the TV and unplug all the wires from it.
  2. Now, wait for a few minutes and connect only a power cable.
  3. Take the remote and press and hold the Power Button + Volume Down buttons together.
  4. After a few seconds, the LG logo will appear, and you can release the buttons.
  5. The hard reset process will be started, and you will have to wait for a few minutes.
  6. The process will be completed automatically.

If this method doesn’t work for you, this means your LG TV doesn’t have the option for a hard reset. So, you will have to try the following method. It will factory reset your TV.

  1. Go to the settings of your TV and click on the general setting.
  2. Now scroll down, look for the Factory Data Reset option, and press OK.
  3. You will see some warnings about the process, and you will have to press confirm.
  4. The reset process will be started and completed in a few minutes. As we mentioned above, this option will delete all the settings set on your TV. You will have to re-connect to Wi-Fi, search for channels, and download apps again.

Resetting the TV will restore it to its original factory condition, solving the issue. 

Customer Service

If none of the above solutions work for you, it might be time to contact LG customer service representative. Customer Support can require you to return the TV to fix the problem. Don’t try fixing the motherboard if you’re planning to sort it out with Customer service and send the device into the hands of experts.

Below are common questions that they might ask you about the TV on the call:

  • Model Number and Serial Number of the TV
  • How and when did the problem occur
  • Your personal details and your address to send their technician 

Also Read: UN7000 vs UN7300, Which Budget LG TV is Right for You?

LG TV HDMI Not Working – Check Connection

Sometimes when you turn ON the TV, the No Signal error appears for a second or two and then it disappears and your TV starts working regularly. In this way, the TV warns you that for some reason it is losing the signal, in fact, the connection. Although the TV quickly returns to normal, do not ignore these warnings. Try to solve them instead.

The good news is that the problem is not very big, and you can easily fix it by following the below-mentioned methods. 

Loose Connections

HDMI not working problems can occur with LG TVs due to the loose connection of the devices. So, you will have to check the connection and ensure that everything is connected properly and in its place. 

Partially Damaged Wires

Partially damaged wires can cause connection difficulty with LG TVs. The wires can get damaged when you accidentally trip over them, or they get crushed or bent during storage. You can often fix this yourself by replacing the damaged wires with perfectly functioning new cables.

Frequently Asked Questions

Why is my HDMI port not working on my TV?

If your HDMI port isn’t working, it’s possible that you might have a bad connection, or your TV might not be detecting the connection. Sometimes all you need to do is turn off all the devices connected to your TV and then turn them on again to achieve a stable connection.

To check if your HDMI port has a bad connection:

1. Unplug the HDMI cable from your TV and then plug it back in firmly.
2. If you are using an HDMI cable splitter, make sure it is connected properly.
3. Try connecting the device directly to the TV instead of having a middleman (like a splitter).

How do I reset my HDMI port on my TV?

If your TV is not detecting other devices when connected via HDMI, you may need to reset your HDMI port. In order to reset the HDMI port, you actually need to reset your TV. During this process, it is important to be patient and wait a certain amount of time after the devices turn off and disconnect completely.

Here are the steps:

• Turn off and unplug all the wires, including the TV’s power cable and HDMI cables.
• Wait for two minutes.
• Plug the power back in and turn on your TV.
• Now turn it off again and wait for a few minutes.
• Plug the HDMI wires back into the TV and turn it ON again.
• This will reset the HDMI port on your LG TV.


Start with the first solution and ensure that your LG TV is not physically damaged. All of these solutions can help fix LG TV HDMI not working issues if you follow the steps properly.

If these solutions helped you in any way, please share your experience with our readers by commenting below. And if you are facing any other problem with your LG TV, you can share your problem with us by commenting below. 

Avatar of Melissa
About Melissa

Hey! I'm Mel, I write the occasional article for Spacehop, amongst other things. I love meeting new people and chatting, so if you have any questions don't hesitate to ask.

Leave a Comment


LG tv keeps disconnecting from wifi

How to connect soundbar to tv with hdmi + other methods