Help library: Help library: [LG OLED TV screen] While watching cable TV, I am repeatedly experiencing symptoms where the screen flickers then shuts off

[LG OLED TV screen] While watching cable TV, I am repeatedly experiencing symptoms where the screen flickers then shuts off

Repair TVS/SOUNDBARS 08/14/2025

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<h2 class="tit">Causes and Symptoms</h2>

<li>The screen flashes while watching shows on cable or public-access television.</li>

<li>I can't see the screen while watching TV on cable/public-access television, and it shows me the "No
Signal" message.</li>

<li>Some channels flicker or don’t show anything when I am watching cable/public-access television.</li>
</ul>
<p class="info-desc">
You may experience screen abnormalities if the antenna is damaged or the connection is weak.<br/>
If the broadcast signal is unstable, the screen of some channels may flash or not show anything.
</p>

<h3 class="sub-tit">Please check the antenna connection status.</h3>
<p class="info-desc idt">➔ You may experience screen abnormalities if the antenna is damaged or the connection
is weak.</p>

<div class="tip-box">
<strong class="tip-tit">How to check the signal strength and quality with TV menu</strong>

<li>
<strong>[2022 WebOS22], [2021 WebOS 6.0]</strong>
Press the <img style="vertical-align: bottom;" alt="Setting button" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=xKngq5jSYrYigmHYgZCTg&amp;portalId=P1"/>
button on the remote control and select [All Settings] → [General] → [Channels] → [Channel Tuning] →
[Manual Channel] → [Cable DTV]
</li>

<li>
<strong>[2020 WebOS 5.0] or before</strong>
Press the <img style="vertical-align: bottom;" alt="Setting button" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=uFLHxaEtDBuDvc9HKQXbQ&amp;portalId=P1"/>
button on the remote control and select [All Settings] → [Channels] → [Channel Tuning] → [Manual
Channel] → [Cable TV].
</li>
</ul><br/>
<p><strong>[2022 WebOS22], [2021 WebOS 6.0]</strong></p>

<div class="con-view txt-idt">
1. Press the <img style="vertical-align: bottom;" alt="Setting button" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=yH8EueHaFeYgLG2lVI2mw&amp;portalId=P1"/>
button on the remote and select [All Settings].
</div>

<div class="con-view txt-idt">
2. Select [General] → [Channels].
</div>

<div class="con-view txt-idt">
3. Select [Channel Tuning] → [Manual Channel].
</div>

<div class="con-view txt-idt">
4. If you’re watching cable, select [Cable DTV].
</div>

<div class="con-view txt-idt">
5. You can see the signal strength and quality of the channel being viewed.
</div>

<div class="img-only">
<img alt="Checking the strength and quality of the Channels you are watching" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=Pq5rIelSet1dPLZXXejvQ&amp;portalId=P1"/>
</div><br/>
<p><strong>[2020 WebOS 5.0] or before</strong></p>

<div class="con-view txt-idt">
1. Turn on the TV and press the [Settings] button on the remote control to select [All Settings].
</div>

<div class="con-view txt-idt">
2. Select [Channels] → [Channel Tuning] → [Manual Channel] → [Cable TV]. (Select when using a cable TV)
</div>

<div class="con-view txt-idt">
3. You can see the signal strength and quality of the channel being viewed.
</div>

<div class="img-only">
<img alt="An image that confirms the strength and quality of the TV you are watching" src="https://gscs.lge.com:/gscs/support/fileupload/downloadFile.do?fileId=Y1dG1XjhUbAu50vFufow&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 OLED TV screen] While watching cable TV, I am repeatedly experiencing symptoms where the screen flickers then shuts off

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