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[LG TV LCD/LED] I see images breaking up or coming up with mosaic patterns while using a set-top box

Troubleshooting TVs 19/05/2023

When a problem occurs with the set-top box or the communication lines, screen images may appear with mosaic patterns.
The symptom can be addressed by initializing the set-top box.
※ If the problem persists even after initialization, please contact your communications carrier for troubleshooting.

Causes and Symptoms

  • I see screen images coming up with mosaic patterns.
An image that half of the screen looks like a mosaic

Try this

How to initialize a set-top box

1. Turn off your TV using the TV remote.

2. Turn off the power switch on the back of the set-top box, wait for 5 seconds, and turn it on again.

Image of turning off the power switch of the set-top box and turning it back on in 5 seconds

3. If the set-top box does not have a power switch, pull out the power cord, wait for 5 seconds, and put it back on.

Image of disconnecting the power cord of the set-top box and reconnecting it 5 seconds later

4. If the power indicator on the set-top box flickers and then lights up, it indicates it has been initialized.

Image with green power light on set-top box

※ The initialization method may differ by the model of the set-top box.

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

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