Help Library: Help Library: [LG Monitor Screen] Screen displays something and then it disappears immediately

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<div class="content-service-view">
    <p class="info-desc">Check if the power cord is correctly connected to the multi tab and if the monitor adapter is accurately inserted.</p>    
<h2 class="tit">Causes and Symptoms</h2>
    
<ul class="cause-list">
        
<li>The power cord(adapter) and the signal cable connections are poor.</li>
        
<li>PC video signal is cut off.</li>
    </ul>
    
<h2 class="tit">Try this</h2>
    
<h3 class="sub-tit">Did you check the power cord and the monitor adapter connections?</h3>
    <p class="info-desc idt">➔ Check if the power cord is correctly connected to the multi tab and if the monitor adapter is accurately inserted.</p>    
<div class="img-only">
        <img alt="Check if the power cord is correctly connected to the multi tab and if the monitor adapter is accurately inserted." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=bqAA6JvJVikqJeVhJCNDzg&amp;portalId=P1">
    </div>
    
<h5 class="sub-tit">Did you remove the connected cable and check the contact?</h5>
    <p class="info-desc idt">➔ Check if internal metal pins are bent or there are alien substances and if so, replace it with an authentic cable.</p>    
<div class="img-only">
        <img alt="Did you remove the connected cable and check the contact?" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=UoTLTz6vUVjQMotuf5mXRw&amp;portalId=P1">
    </div>
    
<div class="tip-box">
        <strong class="tip-tit">Did you connect it with the cable included in the product package provided when purchasing it.</strong>
        
<div class="con-view">
            If you use a cable out of the product specs, then it can cause screen blinking and no display and so on.
        </div>
        
<div class="img-only">
            <img alt="Did you connect it with the cable included in the product package provided when purchasing it." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=dAuqaZx7iNcHRn8qSSkApg&amp;portalId=P1">
        </div>
    </div>
    
<h5 class="sub-tit">Did you check if the [Setting Menu] screen is displayed properly?</h5>
    <p class="info-desc idt">➔ Press the Product [Menu] button to see if you can see the setting menu screen.</p>    <p>If the setting menu window appears, then check the cable or PC instead of checking the monitor.</p>    
<div class="img-only">
        <img alt="Press the Product [Menu] button to see if you can see the setting menu screen." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=6o8j8d8vx2YO6mCeVwhrA&amp;portalId=P1">
    </div>
    <p>※ If the same problem persists after the above remedies, then have it accurately inspected by an LG Electronics technician.</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 Monitor Screen] Screen displays something and then it disappears immediately

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