Help Library: Help Library: [LG Monitor Screen] The screen turns darker. The screen turns dark and bright repeatedly

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<h2 class="tit">Causes and Symptoms</h2>
        
<ul class="cause-list">
            
<li>The cable connection is not good.</li>
            
<li>Monitor setting is changed.</li>
            
<li>The PC is in night mode or the HDR function is [On].</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 plugged into a power strip and the monitor adapter is
            connected properly.</p>        
<div class="img-only">
            <img alt="Did you check the power cord and the monitor adapter connections" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=hEu9T8nRa4ak2ACW1eoPw&amp;portalId=P1">
        </div>
        
<h3 class="sub-tit">Is the cable connected properly?</h3>
        <p class="info-desc idt">➔ Check if the pins are damaged or have foreign objects. If they do, replace the cable
            with an authentic cable.</p>        
<div class="img-only">
            <img alt="Is the cable connected properly" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=iS571DGa5uMj4ciWn9uZQ&amp;portalId=P1">
        </div>
        
<h3 class="sub-tit">Did you check the monitor’s super energy saving function?</h3>
        <p class="info-desc idt">➔ If you use the Smart Energy Saving function, the screen might get darker or brighter.
        </p>        
<div class="tip-box">
            <strong class="tip-tit">How to set the SMART ENERGY SAVING function</strong>
            <p class="txt-idt">※ Menus may differ by model, so please refer to the user guide for details.</p>            
<div class="con-view txt-idt">1. Press the joystick button.</div>
            
<div class="con-view txt-idt">2. Move to the right to select [Settings].</div>
            
<div class="img-only">
                <img alt="Description of pressing the monitor power joystick" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=NtA5PQ0jtP0MfCZRlf3vw&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">3. In [General], set [SMART ENERGY SAVING] to [Off].</div>
            
<div class="img-only">
                <img alt="In [General], set [SMART ENERGY SAVING] to [Off]" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=6EEdcYekVFo1CMABp5KS6A&amp;portalId=P1">
            </div>
        </div>
        
<h3 class="sub-tit">Did you reset the monitor setting?</h3>
        <p class="info-desc idt">➔ Due to a monitor setting error, the screen brightness can get changed. So, reset it
            to the factory setting.</p>        
<div class="tip-box">
            <strong class="tip-tit">How to reset the monitor</strong>
            <p class="txt-idt">※ Menus may differ by model, so please refer to the user guide for details.</p>            
<div class="con-view txt-idt">1. Press the joystick button.</div>
            
<div class="con-view txt-idt">2. Move to the right to select [Settings].</div>
            
<div class="img-only">
                <img alt="Description of pressing the monitor power joystick" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=jI9zEjZETdxGhcNsAcjWg&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">3. In [General], select [Reset Initial Settings] and press [OK] to reset it.
            </div>
            
<div class="img-only">
                <img alt="In [General], set [SMART ENERGY SAVING] to [Off]" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=OneCaZjcjuJC5UEifhdDg&amp;portalId=P1">
            </div>
        </div>
        
<h3 class="sub-tit">Did you check the PC to see if the [Night Mode] function is enabled?</h3>
        <p class="txt-idt">
            1. In the input window at the left bottom of background, search for [Night light] and select it.
        </p>        
<div class="img-only">
            <img alt="In the input window at the left bottom of background, search for [Night light] and select it." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=Law1wl3PvZX8Re33oUWg&amp;portalId=P1">
        </div>
        <p class="txt-idt">
            2. In the night mode setting, click the [Turn off now] button to disable the function.
        </p>        
<div class="img-only">
            <img alt="In the night mode setting, click the [Turn off now] button to disable the function." src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=v8WGqokPsFGFoDY2WiC3A&amp;portalId=P1">
        </div>
        
<h3 class="sub-tit">Did you check the HDR function on your PC?</h3>
        <p class="info-desc idt">➔ If the HDR function is set to [On], there can be changes in the brightness, so set it
            to [Off].</p>        
<div class="tip-box">
            <strong class="tip-tit">Note</strong>
            
<div class="con-view">
                <strong>What is HDR(High Dynamic Range)?</strong>
            </div>
            
<div class="con-view">
                This technology makes a bright place brighter and a dark place darker, so that humans can feel like they
                are seeing it through their own eyes.
            </div><br>
            
<div class="con-view">
                <strong>Setting HDR in Windows 10</strong>
            </div>
            
<div class="con-view txt-idt">1. Right click on your desktop of Windows 10 and select [Display settings].
            </div>
            
<div class="img-only">
                <img alt="Right click on your desktop of Windows 10 and select [Display settings]" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=0cDvRJUwlmvScibp7DKrpg&amp;portalId=P1">
            </div>
            
<div class="con-view txt-idt">2. Set [Use HDR] to [Off].</div>
            
<div class="img-only">
                <img alt="Set [Use HDR] to [Off]" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=6SmHcFTw5Nwu2iyKxQmA&amp;portalId=P1">
            </div>
        </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 Monitor Screen] The screen turns darker. The screen turns dark and bright repeatedly

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