LG TV HDMI Not Working: Complete Guide To Troubleshoot 2022

An HDMI connection is a critical component of any entertainment setup because it is the industry standard for connecting televisions and game consoles. LG televisions occasionally have trouble detecting HDMI signals from specific devices. However, sometimes not working of HDMI on LG TV means there are some issues with the board or maybe the HDMI cable. In addition, no signal message can also appear because of a hardware issue in LG TV HDMI.


If the HDMI port on your LG TV is not working or does not function or detect a signal, it is most likely caused by a motherboard issue. This issue can be resolved by purchasing a replacement that supports HDMI. Alternately, you can try restarting the television to restore its functionality.


We will explore some possibilities for why your HDMI line is not being recognized in this article. We will also discuss how to fix your device at home.


LG TV HDMI Won’t Work.

Suppose your LG television is unable to detect the HDMI signal. Your system may not be compatible with the TV.

Connect another device to your television to determine whether the problem is with the connecting device or the television itself. The previous device cannot communicate with your television if a display appears.

Imagine, however, that this is a recent development with a system you use often. In that case, you may wish to try the following troubleshooting methods to detect the HDMI display. Follow these steps:

  • Plug the HDMI cable into a separate port on the television.
  • Change the HDMI cable. Cables can short out or degrade over time.
  • Check the pins on your linking device for bends.
  • Inspect the HDMI port for damage.


If you see external damage, it is likely the cause of the problem. Fix cable pins and receivers that have flaws by consulting a technician.

Also Read  How To Make Speakers Louder? - Ultimate Guide [2022]

LG TV Doesn’t Connect to HDMI.

The motherboard may have shorted out if your LG TV’s HDMI ports suddenly stop working or not working properly. Many consumers have found that simply replacing the motherboard fixed the problem. Moreover, if your LG TV HDMI is not working, it can be an issue with the motherboard.

Locate an OEM part from an LG supplier that fits your TV before removing the board. To replace the motherboard in your LG unit, follow these steps:

  • Remove the screws holding the back panel of the television. With a flat-head tool, pry off the covering if there are no screws.
  • Disconnect all cables and connectors from the mainboard.
  • Remove all screws holding the board to the wall.
  • Install the replacement board.
  • Attach the new board to the panel.
  • Reconnect the necessary cables.
  • Install the back panel.


LG TV Doesn’t Detect/Show HDMI.

As with a connection issue, if your LG tv is not working and does not show the HDMI signal, the ports on your motherboard may be malfunctioning. Some users have reported great success with a troubleshooting method in that case. Owners may prefer not to hire a technician or purchase a replacement.

Several people suggest that you reflow your motherboard to promote HDMI connections. This method is risky; therefore, you should use safety gear to protect yourself during the process.

Here are the steps for heating your motherboard to restore its functions:

  • Lay your television flat on its screen.
  • Remove the back cover.
  • Then, remove the TV stand.
  • Remove the motherboard.
  • Set your oven to 385° F (196° C) for 15 minutes.
  • Put the motherboard in the oven on top of a porcelain mug.
  • Bake for exactly ten minutes.
  • Let it cool for approximately 25 minutes.
  • Install the new motherboard.


This process works because of the melting point of the elements in your system. Over time, tiny cracks can form in the connections on your motherboard, resulting in HDMI failure. Fortunately, heating the board helps melt the solder and fill in the cracks.

Also Read  What is FX Channel on DIRECTV? Where Stories Come Alive


LG TV Doesn’t Recognize HDMI.

If your LG TV is not working and doesn’t recognize your HDMI connection, try restarting it to reset its mechanics. Unplug all HDMI cables and then disconnect the power for around 10 minutes. Connect the power cable and HDMI wire to see if a difference is made.

Check the resolution settings on the connected unit if this does not work. If your HDMI device has a configuration menu for video resolution, ensure that it is not set to “Auto.” If this is the case, this may be the source of your problem.

For a stable HDMI connection, both devices must have the same resolution. It may be necessary to adjust the specifics of your connecting device to the native resolution of your television, which may be between 420p and 4K.


LG TV Keeps Disconnecting From HDMI: LG TV HDMI Not Working?

Both devices must be registered to communicate via the HDCP standard to establish an HDMI link. It indicates that one or more of the attached devices do not accept the HDMI signal’s HDCP encryption.

You may wish to deactivate the HDCP setting on your connecting machine to resolve this.

Alternately, you can disable the “deep color” function on your LG TV. Some users have reported that this solution solves their problem of disconnecting. Follow the steps below, depending on your model, to disable “deep color”:

  • Navigate to the television’s settings menu.
  • Select “All settings.”
  • Select “Picture.”
  • Navigate to the additional menu settings.
  • Click “HDMI Ultra High Definition Deep Color.”
  • Locate the HDMI port.
  • Press the appropriate button on your remote control to turn off the mode.

Read More About: Samsung Remote Not Working: How To Fix It


LG TV Not Accepting HDMI Input

It is possible that the attached device is not sending output through its HDMI port if your LG television does not accept HDMI input. By changing the video output format of the linked device, the problem can be resolved.

Check your video output device’s manual or configuration menu to see if it is set to HDMI. The selected output will appear on the device’s monitor. The problem might be with the equipment used to connect to the TV in this case.

Also Read  How to Fix Hulu Error Code PLAUNK65? [Complete Guide]


Try Disconnecting the Amplifier Used on Your HDMI Cable

There may be a problem with your HDMI link if you use an amplifier. Ensure that the connections are correctly set by consulting the manual for your AV amplifier. Verify that the input on your amplifier matches the input on your television.

The amplifier should accept the HDMI connection if the settings are incorrect.

The amplifier may be defective. In particular, if you connect an analog connection to an A/V receiver, the receiver will not be able to translate the signal to HDMI for transmission to the TV. Alternatively, you can omit the amplifier entirely and connect the video interface directly to the TV’s HDMI input.


LG TV HDMI Not Supported

Your television’s mainboard is faulty if all ports are malfunctioning. This issue could be port-specific if an HDMI port on your LG TV displays an unsupported message while it is in service. Before removing any metal pieces, check whether your TV has additional HDMI ports.

If so, replace the motherboard as described previously. Suppose there is only one unsupported port. In that case, you can connect your device through the remaining HDMI ports.

In addition, you may see this error message when connecting a machine with a different resolution than your television. If you change the resolution of the connected unit, the TV will support the connection.


LG TV No Signal From HDMI

You may be able to remove a “No Signal” message from your LG TV HDMI by performing a hard reset. There is a standard procedure for resetting each device, which you can find below:


  • Turn off all connected devices.
  • Disconnect the HDMI cables.
  • Turn off the TV.
  • Unplug the power cord.
  • Hold down the power button for thirty seconds.
  • Connect the cables.


Afterward, try to power on your various devices in a different order than you did initially. You can restore your TV’s HDMI functions by reversing the TV’s turn-on sequence.


Related Articles:


Leave a Reply

Your email address will not be published. Required fields are marked *