Help library: Help library: [LG TV Screen] I am getting a black-and-white picture

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<div class="content-service-view">
        <p class="info-desc">
            If the screen appears in black and white when a set-top is connected, it may be due to a poor HDMI cable connection.<br>
            If the screen appears in black and white only in certain channels, it is likely an issue with the broadcast signal rather than the TV itself.
        </p>        
<h2 class="tit">Causes and Symptoms</h2>
        
<ul class="cause-list">
            
<li>The HDMI connection to your set-top box is bad.</li>
            
<li>The broadcast signal is unstable.</li>
        </ul>
        
<div class="tip-box">
            <strong class="tip-tit">Wait! Find out more</strong>
            
<div class="con-view">
                There is an [Accessibility] function in your TV that can enable black and white display during TV operation. (Products released in 2020 or before with WebOS 5.0 or later)<br>
                If the [Grayscale] option is enabled in [Accessibility] in the TV Settings, disable it.
            </div>
            <p><strong>[2021 WebOS 6.0] How to change the Accessibility option</strong></p>            
<div class="con-view">
                Press the <img style="vertical-align: bottom;" alt="All Settings" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=o0OHkb6dX1t1PJ9uzvFg&amp;portalId=P1"> button on the TV remote and select [All Settings] → [General] → [Accessibility] → [Grayscale] → [Off].
            </div>
            
<div class="img-only">
                <img alt="Black conversion on off screen in tv menu" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=qW7k4EWpOCNeePs54KXaQ&amp;portalId=P1"><br>
                <img alt="Black conversion on off screen in tv menu" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=WLA6Q2hK9MNYnGsaUkG28A&amp;portalId=P1">
            </div>
            <p><strong>[2020 WebOS 5.0] How to change the Accessibility option</strong></p>            
<div class="con-view">
                Press the <img style="vertical-align: bottom;" alt="All Settings" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=uLyS436dbErzDhz0C0gEg&amp;portalId=P1"> button on the TV remote and select [All Settings] → [Accessibility] → [Grayscale] → [Off].
            </div>
            
<div class="img-only">
                <img alt="Black and white conversion on off screen in the tv menu" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=mHVENgE4jOstFd9dZdKPQ&amp;portalId=P1">
            </div>
            
<div class="con-view">
                Adjusting the contrast and color saturation can also affect the color output.<br>
                Switch the Picture Mode to the Standard Picture.<br>
                To reset the picture and sound settings, press the [Mute] button on the AI (Magic) remote control three times in a row.
            </div>
            
<div class="img-only">
                <img alt="Video/sound initialization function screen with remote mute shortcut key" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=tUuo5nF1as24kmTHjmV3w&amp;portalId=P1">
            </div>
        </div>
        
<h2 class="tit">Try this</h2>
        
<h3 class="sub-tit">Have you checked the HDMI cable?</h3>
        <p class="info-desc idt">➔ Try reconnecting the HDMI cable to the set-top box.</p><br>
        
<div class="con-view">
            Turn off the power of the TV and the set-top box, disconnect the HDMI cable on the back of the TV and the set-top box, and reconnect it.<br>
            Make sure that you use an HDMI cable version 2.0 or later.
        </div>
        
<div class="img-only">
            <img alt="Disconnect the HDMI cable and reconnect after 3 seconds" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=R6F5Audv4p9YUR6lPlJWtw&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 Screen] I am getting a black-and-white picture

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