If messages such as "Network Error," "No Signal," or "Authentication Failed" appear on your TV screen, it is usually caused by a set-top box signal issue or a poor cable connection rather than a TV malfunction. First, try turning the set-top box off and on again. If the issue persists, contact your set-top box service provider to request a signal check.
Causes of Error Messages on the TV Screen
- Temporary set-top box error: The set-top box system may become unstable due to prolonged use.
- Disconnected network: The internet (LAN) cable may be unplugged, or there may be an outage with your service provider.
- Poor cable connection: The HDMI cable connecting the TV and the set-top box may be loose.
- Service subscription issues: Broadcasting may be suspended due to unpaid bills or delayed activation.
How to Resolve or Check Error Messages
Rebooting the Set-Top Box
Most temporary signal errors can be resolved simply by turning the device off and on again.
- 1. Locate the set-top box behind or below your TV.
- 2. Turn the power switch on the back of the set-top box off and on, or unplug the power cord and plug it back in after 1 minute.
- 3. Wait about 1 to 3 minutes until the power turns on and the screen displays normally.
Checking the Connection Cables
Cables may have become unplugged during cleaning or moving.
- Unplug the HDMI cable connecting the set-top box and the TV, then plug it back in securely.
- Ensure the internet (LAN) cable is properly plugged into the set-top box.
Contacting the Set-Top Box Service Provider
If the issue is not resolved using the methods above and a specific error code or message continues to appear, it may be a signal problem. Contact your set-top box service provider to request a signal reset or inspection.
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This guide was created for all models, so the images or content may be different from your product.
