If messages such as “Network Connection Error,” “No Signal,” or “Authentication Failed” appear on the TV screen,
this is usually caused by a set-top box signal issue or a loose cable connection rather than a problem with the TV itself.
First, restart the set-top box. If the issue persists, contact your set-top box service provider and ask them to check the signal.
Why Do Error Messages Appear on the TV Screen?
- Temporary set-top box issue: The set-top box system may become unstable after extended use.
- Network connection issue: The LAN (internet) cable may be disconnected, or there may be a service outage from your internet provider.
- Loose cable connection: The HDMI cable between the TV and the set-top box may not be plugged in securely.
- Service subscription issue: Broadcast service may be suspended due to unpaid bills or delayed service activation.
What to Check and Do When an Error Message Appears
Restart the Set-Top Box
Temporary signal issues can often be resolved by simply restarting the device.
- 1.Locate the set-top box behind or below the TV.
- 2.Turn the power switch on the back of the set-top box off and then on,
or unplug the power cord, wait 1 minute, and plug it back in. - 3.Wait 1 to 3 minutes for the set-top box to turn on and the picture to appear normally.
Check the Cable Connections
Cables may become loose during cleaning or when moving the TV.
- Disconnect and firmly reconnect the HDMI cable between the TV and the set-top box.
- Make sure the LAN (internet) cable is securely connected to the set-top box.
Contact Your Set-Top Box Service Provider
If the issue is not resolved after following the steps above and a specific error message or error code continues to appear, it may be a signal-related problem.
Contact your set-top box service provider and ask them to check or reset the signal.
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This guide was created for all models, so the images or content may be different from your product.
