(5 Fixes) LG TV Half Screen Darker (Updated 2022)

You desire nothing more than to relax while watching your favorite television programs.

But instead of the usual sharp resolution on your LG TV’s display, you will see…

You discover that one side is unexplainably darker.


What now?

You are fortunate to have discovered the correct website.

Read on to discover:

  • How to run the LG TV’s self-diagnosis successfully.
  • Five simple remedies for when half of your LG television’s display is darker.
  • Determine whether loose wires are to blame and how to secure them.
  • And we’re just beginning…

Why is half my LG television screen black?

Your LG television’s screen is partially black due to weak cable connections. Check your HDMI cables, input sources, and the T-CON board within your TV to resolve this issue. Rarely, the culprit is damaged LCD panels or motherboards, which are more difficult to repair.

LG TV screen dimming: 5 fixes

1: Perform a rapid power cycle

Before you make any changes to your LG television…

Try to perform a rapid power cycle.

“I restarted my television earlier. But that didn’t work.”

Well, a restart differs from a power cycle.

A restart merely turns off your television without draining its battery.

Think of it…

When you restart your television, it’s still connected in, right?

However, the purpose of a power cycle is to completely drain the power from your television.

“How will this assist correct my screen’s darkness?

To address that…

Within your television are capacitors that store power.

And occasionally, when there is a recurring problem…

Capacitors store the problem’s information just as they store energy.

And so long as you don’t deplete the power…

Your television will repeatedly display a half-darkened screen.

So how can we resolve this issue?

Your LG television is easy to power cycle.

How to implement a power cycle:

  1. Turn off the TV.
  2. Unplug it from the power source.
  3. Press the power button for 10 seconds when unplugged.
  4. Observe for ten minutes.
  5. Reconnect your television and turn it back on.

If the problem persists, proceed and…

2: Verify the HDMI cable

HDMI cables transport video from your source of input to your television.

Consequently, it goes without saying that…

A damaged HDMI cable can potentially result in a faulty screen transmission.

However, rest assured Verifying HDMI cables is a simple procedure.

Additionally, if your LG television was manufactured after 2018, this method will be even simpler.

Modern LG televisions include a self-diagnosis capability.

If you have an LG TV manufactured after 2018:

  1. On your remote, press and hold the #9 button.
  2. Select the Optimization settings link.
  3. Examine the overall condition of your TV.
  4. If no issues exist, return to the previous screen.
  5. Select Items to Check.
  6. Click the Check TV Status link.
  7. On the displayed list, pick RF/HDMI.
  8. Select Commence Diagnosis.

If there is an issue with your HDMI cable connection, the diagnosis will indicate so.

However, if your smart TV remote is not functioning or if you have an:

Older model:

  1. Remove the HDMI cord from your television.
  2. Unplug the HDMI cable from the source of input.
  3. Examine for any obvious evidence of damage.
  4. If there is no damage, reconnect one end to the television.
  5. Add the opposite end to your input source.

If one side of the screen remains darker, try a different HDMI cable if you have access to one.

Having a high-quality streaming experience requires a high-quality HDMI cable.

If you are using a regular or older HDMI cable, you should consider purchasing one of higher quality.

If the HDMI cable is not the issue, the next step is to…

3: Change external variables

Occasionally, when LG televisions have a problem…

The problem is external gadgets that connect to the television.

“What external apparatus?

I’m referring to input sources such as a cable box or streaming device such as Roku.

To test, you can attach an alternative source of input to your television.

So I will show you how to achieve it…

To alter your source of input:

  1. Turn OFF both the television and the input device.
  2. Disconnect the HDMI cord from the device being used.
  3. Choose a different source of input, such as a laptop, phone, or computer.
  4. Connect your HDMI cable to the HDMI port on your input source of choice.
  5. Turn on both the television and the new input source.

If your input device is the cause of the issue, this will resolve it.

However, if it is not, you may need to…

4: Clasp loose wires together.

“You mean I must turn on the television?”

This method does not require that, thankfully.

This technique is frequently missed.

However, it is also one of the most effective solutions.

And to connect loose cables…

You must clap your hands with the television in the center.

No joke.

Permit me to walk you through the procedure.

These are…

Methods to connect loose wires:

  1. Keep your LG TV open.
  2. Face the dark side of your LG television screen.
  3. Place one hand on the upper corner’s reverse.
  4. Place the other hand over this corner.
  5. Clap your hands together with the corner of the screen in between.
  6. If this does not resolve the issue, clap again with greater vigor.
  7. Verify that your screen is in working order.

If the television is still not working, you may need to…

5: Examine your T-CON board

If you are pondering…

This time, I’ll need to turn on the television.

You are correct.

Unfortunately, if the previous strategies fail…

You have no choice but to check the T-CON board of your television.

To access the T-CON board, you must pry open the back cover of your LG.

Caution: Only proceed if you understand the dangers and risks of opening your television. If you lack experience repairing circuit boards, you should get assistance from local professionals.

What you require:

  • Latex gloves.
  • A screwdriver is included.
  • A magnifying glass.

Caution: Never use a metal object to lift any TV components with. A small scrape or slip can irreparably harm your LG television.

To open your LG television:

  1. Place the television on a soft surface.
  2. Remove the back cover from your LG television with care.
  3. Unplug any connections connecting your cover to the circuits.

To examine the T-CON board:

  1. Find the T-CON board.
  2. Locate the LVDS cable, which contains numerous skinny wires.
  3. Disconnect the cable.
  4. Utilize a magnifying glass to examine every pin.
  5. If there are no damages, reinsert the object.
  6. Reconnect the cable ribbons.
  7. Ensure that your board is free of dust and debris.

If your LG television has just minor issues, this should resolve the dark screen problem.

But if the situation persists…

It is time to replace your television.

If the T-CON board is not the issue, then…

It is possible that your motherboard or LCD panels are malfunctioning.

And in each situation…

It could be wiser to purchase a new television.

LCD panels are particularly difficult to work with.

Others have attempted repairs, only to lose their televisions in the process.

Therefore, if it’s been a while since you bought your television…

And if your smart TV has been so sluggish recently…

It may be time to let it go and purchase yourself a new one.

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