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[LG TV Screen] The screen does not display some specific colors.

Troubleshooting TVs 31/08/2023

If the screen doesn’t show specific colors or shows bleeding colors when connected to a set-top box, it may be due to a poor HDMI cable connection.
If colors bleed only in certain channels, it is likely an issue with the broadcast signal rather than the TV itself.

Causes and Symptoms

  • The connection to your set-top box is bad.
  • The broadcast signal is unstable.

Try this

The screen doesn’t show specific colors or shows bleeding colors?

➔ Try reconnecting the HDMI cable to the set-top box.

Reconnecting the HDMI cable to the set-top box
Turn off the power of the TV and the set-top box, disconnect the HDMI cable on the back of the TV, and reconnect it (HDMI, Component).
It is recommended to use an authentic HDMI cable to connect your TV to a set-top box.
Make sure that you use an HDMI cable version 2.0 or later.
unplugging and plugging in the HDMI cable from the TV

Have you checked the HDMI cable using [Quick Help]?

➔ Try using [HDMI Check] in [Quick Help] in the TV Settings to diagnose the condition of the HDMI cable.

The [Quick Help] feature allows you to check if the HDMI cable is faulty or not. (Only applies to products released in 2019 or later)

Running [Quick Help] in the Settings menu
Press and hold the [9] button on the TV remote for more than 1 second and select → [Check TV Status] → [Check RF/HDMI] → [Health Check] → [Learn More]
① Select [Check Items].
run Quick Help
② Select [Check TV Status].
running Check TV Status
③ Select [Check RF/HDMI].
running Rf/HDMI check
④ Select [Health Check] and then ⑤ [Learn More].
executes status diagnosis
If there are any abnormalities discovered from the test, replace the HDMI cable with a genuine cable.
If the picture problem does not occur in the test, please contact the set-top service provider. (e.g., cable TV, Skylife, IPTV)

Does the problem persist even after checking the cable?

➔ Go to [Settings] and start [Picture Test] to check if the picture works normally.

You can perform a picture test to check for any abnormalities in the product.
If the image on the test screen appears okay, it may indicate a problem with the broadcast signal rather than the product itself.
In this case, please contact your broadcast service provider for further assistance. (e.g., cable TV, Skylife, IPTV)
If the picture test screen does not display correctly, you may need to contact LG Electronics service technician for further troubleshooting support.
Running [Picture Test] in [2021 WebOS 6.0]
Press the setting button on the TV remote and select [All Settings] → [General] → [OLED Care] → [Device Self-Care] → [Screen Self-Diagnosis]
Turn on the TV and press the [Settings] button on your TV remote.
Select [All Settings] in the [Settings] menu.
Press the remote control setting button to select all settings
① Select [General] and then ② [OLED Care].
running OLED Care
③ Select [Device Self-Care] in [OLED Care].
running device self care
④ Select [Screen Self-Diagnosis] in [Device Self-Care].
running screen self-diagnostics
⑤ Perform [Picture Test] to check the screen condition.
Running [Picture Test] in [2020 WebOS 5.0]
[2020 WebOS 5.0] Press the setting button on the TV remote and select [All Settings] → [General] → [Additional Settings] → [Picture Test].
Running [Picture Test] in [2019 WebOS or before]
[2019 WebOS or before] Press the setting button on the TV remote and select [All Settings] → [General] → [Additional Settings] → [Picture Test].

This guide was created for all models, so the images or content may be different from your product.

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