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HDMI Not Working on LG TV

HDMI Not Working on LG TV: Causes & Fixes

LG Smart TVs include HDMI ports that help hook up any additional devices. The HDMI on your LG Smart TV may fail to work properly in rare cases for varied reasons. As a result, the TV may not detect the external device connected via HDMI cable. In this case, one must troubleshoot the issue and fix it. Fortunately, there are a few DIY fixes that help resolve HDMI not working on LG TV issue in no time. With this, your LG TV will recognize any external devices, such as Roku, Amazon Firestick, and gaming consoles like Xbox, connected over the HDMI port of the TV.

How to Fix HDMI Not Working on LG TV

The LG TV HDMI not working issue occurs at any time due to the motherboard malfunction, loose or faulty cable, firmware issues, and more.

LG TV Doesn’t Detect/Recognize HDMI

HDMI may not work on LG TV when the device fails to recognize the HDMI connection.


  • The HDMI port on the TV or external device is damaged
  • Incorrect HDMI settings on TV or external device
  • Motherboard malfunctions


You can follow the troubleshooting ideas given in the below section to fix the error easily all by yourself.

1. Try Different HDMI Input

If there is any issue with the current input source activated on the TV or connecting to the wrong HDMI port, then your TV might not respond to the HDMI. So, switch the input using the following steps.

[1] On your LG TV remote, press the Input or Source button.

[2] You will get different HDMI ports.

[3] Select the different HDMI ports and see if the HMDI port works well or not.

In case your TV remote does not have the input or source button, then use the following steps.

[1] On your remote, press the Home button.

[2] Move the cursor to the top corner of the screen and click the Input or Source button.

[3] From the option, choose the different input source and confirm it.

2. Repair or Replace the Motherboard

When the HDMI port completely stops working, you can replace the motherboard with the new one. A faulty motherboard may also be the reason for the HDMI ports not working on LG TV.

[1] Using the screwdriver, remove the screws on the back of the TV.

[2] Then, from the motherboard, disconnect all the cables and connectors.

[3] Unscrew the motherboard from the LG TV wall and slide the new board into place.

[4] Insert the screw back into the TV and connect the new motherboard.

[5] Plug the cables back and connect them again and ensure to attach the panel to your TV.

LG TV HDMI Keeps Disconnecting

HDMI on the LG smart TV may not function properly when the HDMI cable keeps on disconnecting.


  • Faulty HDMI cable
  • Poor HDMI connection


It is vital to use the right HDMI cable on the LG TV if you don’t want to come across HDMI disconnecting issue.

1. Check HDMI Port and Cable

Before proceeding with the advanced steps, ensure to check your HDMI cables, ports, and input source both on the TV and the console. To see whether the problem is with the HDMI cable or port, try using different cables. Also, inspect the pins on your HDMI link device are damaged or not. If you find any bend pins, then you need to contact the manufacturers.

Check HDMI Port and Cable

While plugging the HDMI cable, sometimes there is a chance of getting damaged, So check if there is any damage inside the port. If there is any physical damage, then replace the cable with a new one.

2. Disable HDCP

HDCP is the protection encode that is developed to prevent unauthorized material that is sent via HDMI connection and devices. If your connection keeps disconnecting, it means that the HDMI-attached device is not accepting the encrypted high-definition content. So, turn off the HDCP and see if the error is fixed or not. You can also try disabling the deep color function with the below steps.

[1] On the home page, go to the Settings menu and select the All Settings option.

[2] Then, choose Picture.

[3] Navigate to Additional Menu settings and select the HDMI Ultra High Definition Deep Color option.

[4] Now, choose the HDMI port to which the device is connected.

[5] Finally, press the remote control’s button to turn it off.

LG TV Not Accepting HDMI Input

At times, LG TV itself will not accept the HDMI input and this may be the primary cause for HDMI to not work on your LG smart TV.


  • Improper TV settings.
  • Using the HDMI switch to connect the HDMI device and amplifier.


You shall try the fixes below and with this, your LG TV may accept the HDMI input.

1. Change Screen Resolution

If the resolution setting of the device is not compatible with the resolution of your LG TV, then you will get the No HDMI Signal message on your TV screen. This happens because your LG TV won’t able to display the higher resolution that it is capable of. To fix it

[1] On your connected device, go to the resolution settings or video output settings.

[2] Select the Auto option, or you can manually set the resolution of your TV.

[3] Your TV resolution will usually range from 420p to 4k or higher.

2. Disconnect Amplifier

Sometimes, if you’re using the HDMI switch to connect both the HDMI device and amplifier, then you might face certain issues. You need to also ensure that the input on the amplifier is reflected in the input on the TV.

[1] Switch off your LG TV and unplug the cable from the power cord.

[2] Then, unplug the HDMI switch from the TV and the amplifier connection.

[3] Wait for a few minutes and plug it back into the TV and see if the HDMI port is working properly or not.

[4] You can also turn off the amplifier completely and connect the video interface to the HDMI input.

LG TV Displays No Signal from HDMI

Sometimes, LG TV will not detect the HDMI connection and will display no signal from HDMI when the device requires any update.


  • Technical glitches
  • Improper power supply


HDMI not signal issue on the LG Smart TV can be fixed with the general troubleshooting ideas.

1. Power Cycle Your LG Smart TV

HDMI Not Working on LG TV- Perform power cycle

[1] Turn off your LG TV and unplug the power cable from the power socket.

[2] Wait for a few minutes and plug the power cable back into the socket and turn on the TV.

[3] This will power cycle your LG TV. Now, check if the TV can see the HDMI device.

2. Update LG TV

If you’re using the older version of LG TV, then you will probably end up with several errors and issues. So, keep updating the LG TV to the latest software regularly.

[1] Press the Home button and select the Settings option from the home page.

[2] Then, select the All Settings option.

[3] From that, choose General and click the About this TV option.

Update LG TV

[4] If any new update is available, you will see it under the TV.

[5] Click the Install or Download and Install button to download the latest version.

[6] Once updated, see if the HDMI port is working or not.

3. Factory Reset LG TV

You need to remember that performing the factory reset on LG TV will completely erase all the stored information or data and the settings customized.

[1] Press the Home Button on your TV remote.

[2] Click the Settings icon and choose General from the Settings page.

[3] Then, click on the Reset to the Initial Settings option.

HDMI Not Working on LG TV -Factory Reset LG TV

[4] Now, provide the TV’s four-digit password and click Ok.

[5] That’s it. Your LG TV will reset.

Contact LG TV Support

If the HDMI is not working after trying all the above methods, then you can contact customer support LG service by visiting its official website. Explain the issue to them, and they will help you to sort it out.


How many HDMI ports do TVs have?

Usually, all LG TV comes with 3 HDMI ports (1 in rear, 2 on the side). Few latest model LG TV has four or more HDMI ports.

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