LG TV’s sound can intermittently cut out if the Simplink feature is turned on, there is an issue with the HDMI ARC or Optical out setting, or the TV encounters a system glitch.
In most cases, when the sound on an LG TV is not working, cuts out, or experiences dropouts for seconds or more, a simple power reboot fixes this issue.
But if not in your case, this article will break down everything!
Let’s dive into it…
How to Fix LG TV Sound Cuts Out
Here are the detailed guidelines;
Step 1: Perform an HDMI Refresh (Don’t Skip)
You have to do this using a very popular method—Power Cycling.
I know this is something no one even wants to hear!
But it really works!
The reason is quite simple: TVs automatically develop defects as a result of unexpected system activity, which later affects the operator files and impairs the internal operations of the TV.
When you power cycle the TV, it eliminates these bugs and restores the affected files.
- Disconnect the TV from the power socket entirely.
- Likewise, detach all HDMI and audio cables linked to the TV.
- Allow a full 5-minute interval (No compromises here).
- During this time, press and hold the TV’s power button for about 30 seconds.
- Once done, power the TV back on.
Do the same thing with your audio system/speaker.
Now test the sound again. If the sound no longer cuts out, your problem has been successfully fixed. If not, proceed to the next step.
Note: This is merely a temporary solution. You may find yourself repeatedly going through the same process whenever you want to enjoy your favorite shows.
Step 2: Do a Sound Test
It’s possible that the device you’re using to enhance sound is not working properly, or if you’re not using any external device, the built-in sound system may have a problem.
But how can you figure this out?
Well, doing a sound test will help you in this situation.
Here’s what you can do:
- Access the “All Settings” menu.
- Go to “Support” and then “Additional Settings.”
- Choose “Sound Test” and turn it on.
When you turn on the “Sound Test” feature, it will turn off any external sound systems or speakers and use the internal speaker of your device instead.
Now, listen carefully to the sound coming from your TV’s internal speaker.
If the sound is clear and not cutting out, it’s likely that the external sound system is the issue.
However, if the sound is still distorted or dropping out, then the problem lies with your device’s internal sound system.
Note: In some newer and more advanced LG TV models like OLED, the “Sound Test” option might be called “Sound Self-Diagnosis.” So if you can’t find the “Sound Test” option, look for “Sound Self-Diagnosis.”
Step 3: Reset the “Digital Sound Out” setting
Sometimes, the sound settings can change on their own due to unexpected power outages, problems inside the TV, or other reasons.
If this happens, you’ll need to reset the mode to check what solves the issue.
- Access TV settings.
- Look for audio/sound options.
- Find “Additional Settings”
- Locate the “Digital Sound Out” option. (refer to picture)
Now from there, select different options such as “pass through,” “PCM,” or “auto” to see if any of them solve the issue.
Anyway, I recommend that you check out this article too:— How to Fix When Optical Out Not Working on LG TV?
Step 4: Disable the “Simplink” feature
This is something that nobody really talks about.
Before creating this guide, I watched almost 30 YouTube videos and read hundreds of online articles, but they all suggest the same steps: restart the TV, check the HDMI cable, reset the sound settings, and so on.
No one pays attention to this troublemaker.
Although Simplink (HDMI-CEC) is a useful feature, it often disrupts the audio output and causes the TV’s sound to occasionally cut out.
Anyway, here’s how to deactivate it: (LG Web OS)
- Access the “All Settings”
- Navigate to “Connection” and then “Device Connection Settings”
- From here, turn off the “Simplink (HDMI-CEC)“
Once you are done, reboot the TV and test whether the issue has been successfully fixed.
Make sure that the HDMI cable is firmly connected on both ends and that the ports are clean and undamaged. Also, try temporarily turning off ‘Dolby Atmos‘ to see if it makes any changes.
Q: Why does the sound only cut out during specific TV shows or channels?
In some cases, sound cutting out during specific content could be related to the source signal itself.
It might be worth checking if the issue persists across different sources (e.g., cable/satellite, streaming, gaming consoles) to determine if it’s content-specific or a broader problem.
Q: Can external devices connected to my LG TV cause sound interruptions?
Yes, external devices like soundbars, speakers, or gaming consoles can potentially interfere with the TV’s audio output.
Ensure that all connected devices are compatible and functioning correctly. Try disconnecting them temporarily to see if the sound issue persists.
Q: Why does the sound on my LG TV cut out intermittently when I’m streaming content?
Streaming services rely on a stable internet connection.
If your internet speed is slow or experiencing fluctuations, it can cause buffering issues, leading to sound interruptions.
Try restarting your modem/router or connecting your TV to a wired internet connection for improved streaming performance.
Q: I’ve noticed that sound cutting out on my LG TV occurs mainly during action-packed scenes in movies. Why is that?
Action scenes often have dynamic sound effects and a wide range of frequencies.
If the TV’s audio settings or sound mode are not properly configured to handle such content, it can lead to sound distortion or cutouts.
Experiment with different sound modes or adjust the equalizer settings to enhance audio performance during intense scenes.
Q: Can outdated firmware cause sound cutting out on my LG TV?
Yes, outdated firmware can potentially lead to various issues, including sound interruptions.
LG periodically releases firmware updates to address bugs, enhance features, and improve overall system stability.
Make sure to check for firmware updates on LG’s website or through the TV’s settings menu and install any available updates.
Abdul Kader, a handy guy and experienced founder of a TV repair shop in Gulshan, Dhaka, Bangladesh. He is mainly an expert in understanding and repairing different types of issues with Smart TVs and providing helpful insights on how to keep them in good working order. Read his Full Story.