If your LG TV screen flickers or goes blank, this usually happens when the broadcast signal is weak or the connection to an external device, such as a set-top box, is unstable. Use your remote to open the TV menu and check if it appears normally.
If the menu is clear, reconnect your HDMI cable or check the broadcast signal strength.
Why Is the TV Screen Flickering?
- Your antenna connection is loose or the broadcast signal is weak.
- The connection to your external device is unstable.
- Your TV has an internal component issue.
How to Fix a Flickering TV Screen
Step 1. Check the TV Menu
Press the volume or Settings button on your remote to check if the menu appears normally.
If the menu is clear, the issue is likely with an external device or cable. If the menu also flickers, contact LG Customer Support.
Step 2. Reconnect Your Cables
Turn off your TV and set-top box.
Disconnect the HDMI cable from the back of your TV, and then reconnect it securely.
Step 3. Check the Broadcast Signal Strength
Press the Settings (gear icon) or Mute button on your remote three times.
- If the signal strength is below 50% or the signal quality fluctuates by more than 30%, your broadcast signal may be weak. Contact your service provider to check the signal.
- For webOS 6.0 and later (2021 and newer): Press the Settings button on your remote, and then select All Settings, General, Channels, Channel Tuning, and Manual Tuning. Select your antenna type to check the signal.
- For webOS 5.0 and earlier (2020 and older): Press the Settings button on your remote, and then select All Settings, Channels, Channel Tuning, and Manual Tuning. Select your antenna type to check the signal.
Step 4. Still need help?
If the issue persists after following the steps above, you can get further support through LG Chatbot on our website or by requesting a technician visit.
FAQ
- Q. What should I do if the TV menu also flickers?
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A. If the TV menu also flickers, this usually means the issue is with your TV, not a connected external device.
Contact LG Customer Support for assistance.
- Q. Why does the screen flicker only in a specific streaming app?
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A. There may be an issue with the app’s picture or playback settings.
If the issue continues, delete and reinstall the app.
Move left or right to check the contents.
This guide is based on standard models. The settings menu may vary by model.
