Help Library: Help Library: [LG TV Sound] Audio is not working even when changing channels

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<div class="content-service-view">
        <p>
            If you lower the TV master volume to the minimum level (0) or mute it <img style="vertical-align: bottom;" alt="Speaker button" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=BrvwtuqLpaEgRdIqV0pA&amp;portalId=P1">,
            no sound comes out of the TV.<br>
            Turn up the TV volume and see if the volume changes accordingly.<br>
            If you are using a set-top box, check if the audio is working by adjusting the volume with the set-top box
            remote control.
        </p>        
<h2 class="tit">Causes and Symptoms</h2>
        
<ul class="cause-list">
            
<li>Speaker settings have been changed.</li>
        </ul>
        
<div class="img-only">
            <img alt="Image with set-top box volume and TV volume displayed on the TV screen" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=KlODanxnCGttcrSL5fKmQQ&amp;portalId=P1">
        </div>
        
<div class="tip-box">
            <strong class="tip-tit">Note</strong>
            
<div class="con-view">
                If the volume display does not change as illustrated below, it indicates that an external speaker is set
                as the output.<br>
                Please set the internal speaker as the output.
            </div>
            
<div class="img-only">
                <img alt="Image showing that the Tv cannot adjust the volume" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=4mqpItrtQhJ9ashQ2LWvsw&amp;portalId=P1">
            </div>
            
<div class="con-view">
                Set-top box program errors may affect the audio (active video without audio).
            </div>
            
<div class="img-only">
                <img alt="Image Switch off the 3rd-top box power switch and turn on 5 seconds" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=EGkZ7Dec3w3eztW4jUqzCQ&amp;portalId=P1">
            </div>
        </div>
        
<h2 class="tit">Try this</h2>
        
<h3 class="sub-tit">The volume indicator does not appear on the screen while adjusting the volume?</h3>
        <p class="info-desc idt">➔ Change the output speakers in the TV Settings menu.</p>        
<div class="tip-box">
            <strong class="tip-tit">Changing the [Sound Out] option in Settings.</strong>
            
<div class="con-view">
                Turn on the TV and press the [Settings] button on your TV remote.<br>
                Select [All Settings] in the [Settings] menu.
            </div>
            
<div class="img-only">
                <img alt="Image of selecting an all-setting menu by pressing the settings button on the TV" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=fovoujumu4VpAFaKlLSs3w&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">
                1. Select [Sound Out] in [Sound].<br>
                Make sure the internal speaker is set as the output speaker.<br>
                If it is set to the internal speaker, skip to the next section.
            </div>
            
<div class="img-only">
                <img alt="Images that select Sound Out in Sound Settings" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=SHPKShsrFIo4gLvt9VheaQ&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">
                2. Set [Sound Out] to [internal TV Speaker] if it is not set as such.<br>
                Test the volume after setting [Sound Out] to [internal TV Speaker].
            </div>
            
<div class="img-only">
                <img alt="Image of selecting an internal TV speaker in the sound-out settings" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=pc36vRTuivf6ckcIpU0ryA&amp;portalId=P1">
            </div>
        </div>
        
<h3 class="sub-tit">Volume control works okay, but no sound comes out</h3>
        <p class="info-desc idt">➔ Select [Sound Test] in the TV Settings menu and perform the test as follows.</p>        
<div class="tip-box">
            <strong class="tip-tit">Conducting [Sound Test] in Settings.</strong>
            
<div class="con-view">
                Turn on the TV and press the [Settings] button on your TV remote.<br>
                Select [All Settings] in the [Settings] menu.
            </div>
            
<div class="img-only">
                <img alt="Image that selects all settings by pressing the settings button on the remote control" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=1B3VLkfv2VETMsEEqYKcQ&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">
                1. Select [Sound Test] in [Sound].
            </div>
            
<div class="img-only">
                <img alt="Image that selects a sound test in the sound settings" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=ha6JSnxgb4kP43QFs0W5g&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">
                2. Check if the test sound comes out normally after [Sound Test] is selected.<br>
                If it works, the problem is likely due to the set-top box.<br>
                Please contact the provider of the set-top box.
            </div>
            
<div class="img-only">
                <img alt="Image that displays a completed sound test message on the TV screen" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=ulNoqmLUkbJEB1dTBsiEw&amp;portalId=P1">
            </div>
        </div>
        
<div class="tip-box">
            <strong class="tip-tit">Wait! Find out more.</strong>
            
<div class="con-view">
                If the set-top box is turned off, the “No Signal” message appears on the TV screen.<br>
                Check if the set-top box is on.
            </div>
            
<div class="img-only">
                <img alt="Image with green light on set-top box power light" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=bqvUJVgQV0EfkF7x6MzA&amp;portalId=P1">
            </div>
            
<div class="con-view">
                Set-top box errors may result in the “No Signal” message even when the device is powered. </div>
            
<div class="img-only">
                <img alt="Image Switch off the 3rd-top box power switch and turn on 5 seconds" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=rPg84QdSZqF7EYhvzZqw&amp;portalId=P1">
            </div>
        </div>
        <p class="txt-idt">※ If the problem persists after the actions are taken, contact our service technician for diagnosis and
            precise check.</p>        <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 Sound] Audio is not working even when changing channels

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