Help Library: Help Library: If Your LG TV Shows a Double Image or Ghosting

If Your LG TV Shows a Double Image or Ghosting

Troubleshooting TVs 11/09/2026

<div class="content-service-view" itemtype="HowTo">
<p class="description info-desc">A doubled or ghosted picture is usually caused by a weak broadcast signal, an external device issue (such as a set-top box), or a loose HDMI connection.<br/>To identify the cause of the issue, run a Picture Test or Screen Self-Diagnosis to check the TV's display, check your broadcast signal strength, and disconnect and securely reconnect the HDMI cable.</p>

<h2 class="tit mainName">Why Does Your TV Show a Double Image or Ghosting?</h2>

<li>A connected device, such as a set-top box or game console, may be sending an unstable video signal.</li>

<li>The HDMI cable connecting the TV and the external device may be loose or damaged.</li>

<li>The cable or antenna signal may be weak or unstable on one or more channels.</li>

<li>The TV may have an internal issue.</li>
</ul>

<h2 class="tit">How to Check Your TV Picture</h2>

<h3 class="name sub-tit">Step 1. Run Screen Self-diagnosis</h3>

<div class="tip-box">
<strong class="tip-tit">Check Your TV's webOS Version</strong>
<p>On your TV remote, press the Settings button (gear icon) or the Mute button three times in a row.</p>        </div>

<li>Run the test to check whether the picture problem is coming from the TV or a connected device, such as a set-top box.</li>

<li>If the test picture looks normal, check the HDMI cable connection and the settings and condition of the connected device.</li>

<li>If the test picture appears normal, check the HDMI cable connection and the settings and condition of the connected external device.</li>

<li>If the same problem appears during the test, your TV may need service.</li>

<li>For OLED TVs released in 2024 or later (webOS 23 or later): Press the Settings button on your remote. On your TV, select All Settings, followed by Support and Screen Self-Diagnosis.</li>

<li>For OLED TVs released in 2021 or later (webOS 6.0 or later): Press the Settings button on your remote. On your TV, select All Settings, followed by General, OLED Care, Device Self Care, and Screen Self-Diagnosis.</li>

<li>For OLED TVs released in 2020 or earlier (webOS 5.0 or earlier): Press the Settings button on your remote. On your TV, select All Settings, followed by Support, Additional Settings, and Picture Test.</li>

<li>For OLED TVs released in 2019 or earlier (webOS 4.5 or earlier): Press the Settings button on your remote. On your TV, select All Settings, followed by Picture Test.</li>

<li>For TVs released in 2021 or later (webOS 6.0 or later): Press the Settings button on your remote. On your TV, select All Settings, followed by Support and Screen Self-Diagnosis.</li>

<li>For TVs released in 2020 (webOS 5.0): Press the Settings button on your remote. On your TV, select All Settings, followed by Support, Additional Settings, and Picture Test.</li>

<li>For TVs released in 2019 or earlier (webOS 4.5 or earlier): Press the Settings button on your remote. On your TV, select All Settings, followed by Picture Test.</li>
</ul>
</div>

<h3 class="name sub-tit">Step 2. Check the HDMI Cable and External Device</h3>
<p class="text">Turn off your TV. Disconnect the HDMI cable and check the connectors for dust. Remove any visible dust, and then reconnect the cable securely. Try another HDMI cable to check whether the current cable is faulty.<br/>
<br/>
Unplug the connected device from the power outlet. Wait about one minute, and then plug it back in to restart it.</p>    </div>

<h3 class="name sub-tit">Step 3. Check the Antenna or Cable Signal Strength</h3>

<li>Check whether the signal strength for the current channel is below 50% or whether the signal strength or quality fluctuates by 30% or more.</li>

<li>For TVs released in 2021 or later (webOS 6.0 or later): Press the Settings button on your remote. On your TV, select All Settings, followed by General, Channels, Channel Tuning, and Manual Tuning. Select the connected antenna to view the signal information.</li>

<li>For TVs released in 2020 or earlier (webOS 5.0 or earlier): Press the Settings button on your remote. On your TV, select All Settings, followed by Channels, Channel Tuning, and Manual Tuning. Select the connected antenna to view the signal information</li>
</ul>
</div>

<h3 class="name sub-tit">Step 4. Still Need Help?</h3>
<p class="text">
If the issue persists after following the steps above, you can get further support through LG Chatbot on our website or by requesting a technician visit.</p>    </div>

<h2 class="tit">Frequently Asked Questions</h2>

<span aria-label="Question" role="img">Q.</span> Why Does Text from My Set-Top Box Look Doubled When the Test Picture Looks Normal?</dt>
<dd>

<span aria-label="Answer" role="img">A.</span> If the test picture looks normal, the TV is likely not causing the problem. <br/>The HDMI cable may not be connected securely, or there may be an issue with the signal from your set-top box. Disconnect and reconnect the HDMI cable. <br/>You can also try another HDMI port or cable. If the problem continues, contact your set-top box provider to have the device inspected.</dd>
</dl>
<dl>
<dt>

<span aria-label="Question" role="img">Q.</span> What Should I Do if the Channel Signal Strength Is Below 50%?</dt>
<dd>

<span aria-label="Answer" role="img">A.</span> Check the coaxial cable connection between the wall outlet and your TV. <br/>If the cable is connected securely but the signal remains weak, there may be an issue with the broadcast signal. <br/>Contact your TV service provider to have the signal checked.</dd>
</dl>
</div>
<p class="mobile-txt">Move left or right to check the contents.</p><p class="help-txt">

<span aria-hidden="true">*</span> This guide is based on standard models. The settings menu may vary by model.</p></div>

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