Help library: Help library: [LG TV OLED] I use a set-top box for watching TV. The TV produces the sound okay but not the screen

[LG TV OLED] I use a set-top box for watching TV. The TV produces the sound okay but not the screen

Repair TVS/SOUNDBARS 11/11/2024

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<body>
    
<div class="content-service-view">
        <p class="info-desc">
            If the TV produces the sound okay but not the screen, you can check the condition of the TV by performing an image test on the TV.<br>
            If you have a problem with the set-top box or with the telecommunication line, the sound may be produced okay, but not the screen. In this case, you may try resetting the set-top box to solve the problem.<br>
            If you don't see the texts such as the TV channel or HDMI port information as shown below when you turned on the TV, we recommend that you request LG Electronics service technician to perform diagnosis on the TV and check the symptom.
        </p>        
<div class="img-only">
            <img alt="Image that displays information about channels and external inputs at the top of the TV screen" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=ABpGVA273YMHyyQK8OZA&amp;portalId=P1">
        </div>

<h4 class="tit">Causes and Symptoms</h4>
        
<ul class="cause-list">
            
<li>I use a set-top box for watching TV. The TV produces the sound okay, but not the screen.</li>
        </ul>

<h4 class="tit">Try this</h4>
        
<h5 class="sub-tit">Do you see nothing on the TV screen?</h5>
        <p class="info-desc">➔ Turn on the TV and press the [Home] button or the [Volume] button to see if the screen displays the menu or the volume level without problem.</p><br>
        <p>If you see the menu on the screen, turn off the set-top box and turn it back on to see if the TV screen is displayed properly.</p>        
<div class="img-only">
            <img alt="Image of checking the menu on the homeboard, volume, with the remote control" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=kMdFCElBBdPBQFDL9beQ&amp;portalId=P1">
        </div><br>
        <p class="txt-idt">
            1. Turn off your TV using the TV remote.
        </p>        <p class="txt-idt">
            2. Turn off the power switch on the back of the set-top box, wait for 5 seconds, and turn it on again.
        </p>        
<div class="img-only">
            <img alt="Image of power switch off and on the back of the set-top box" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=ZabkJucNWUiqdIzLOSjheQ&amp;portalId=P1">
        </div>
        <p class="txt-idt">
            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.
        </p>        
<div class="img-only">
            <img alt="Image of disconnecting and reinserting the power cable on the back of the set-top box" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=I50sPYnKd282oFBsNKT00w&amp;portalId=P1">
        </div>
        <p class="txt-idt">
            4. If the power indicator on the set-top box flickers and then lights up, it indicates it has been initialized.<br>
            The initialization method may differ by the model of the set-top box.
        </p>        
<div class="img-only">
            <img alt="Images powered on by set-top box type" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=NUhRM54NvLeNDtEPvV0yBw&amp;portalId=P1">
        </div>
        <p class="help-txt">This guide was created for all models, so the images or content may be different from your product.</p>    </div>

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[LG TV OLED] I use a set-top box for watching TV. The TV produces the sound okay but not the screen

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