Why a Sony Soundbar with LG OLED Can Have No Sound
If your Sony soundbar with LG OLED no sound issue is happening, the cause is usually not the speakers themselves.
In most cases, the problem comes from HDMI ARC or eARC settings, device control conflicts, or an audio format mismatch between LG OLED TVs and Sony soundbars.
LG OLED models and Sony soundbars can work very well together, but they depend on the right connection path and configuration.
A small setting change in the TV menu, soundbar input mode, or HDMI cable can silence the system entirely.
Check the Physical Connection First
Start with the hardware before changing advanced audio settings.
The most common signal path is from the LG OLED TV’s HDMI ARC or eARC port to the Sony soundbar’s HDMI ARC input.
- Use the TV’s HDMI port labeled ARC or eARC.
- Connect that port to the soundbar’s HDMI OUT (TV eARC/ARC) port.
- Make sure the cable is fully seated at both ends.
- Use a high-speed HDMI cable, preferably one rated for HDMI 2.0 or HDMI 2.1.
If the soundbar is connected to the wrong HDMI input, the TV may still detect it, but audio will not route correctly.
Optical audio can work too, but HDMI ARC or eARC is the preferred method for Dolby Atmos, remote volume control, and TV-based audio switching.
Confirm the LG OLED Sound Output Setting
LG OLED TVs can send sound to internal speakers, HDMI ARC, optical, Bluetooth, or external audio devices.
If the TV is still set to internal speakers, the soundbar may appear connected while remaining silent.
- Open the TV sound settings.
- Set Sound Out to HDMI ARC, HDMI eARC, or External Speaker.
- If available, disable TV internal speakers when using the soundbar.
- Test by playing a channel, app, or streaming title known to have audio.
On many LG OLED models, the Simplink feature must also be enabled for HDMI device control.
Simplink is LG’s HDMI-CEC implementation, and it helps the TV and soundbar communicate properly for switching inputs and adjusting volume.
Enable HDMI-CEC and eARC on Both Devices
One of the biggest reasons for a Sony soundbar with LG OLED no sound problem is disabled control communication.
HDMI-CEC allows devices to exchange commands, while eARC improves audio bandwidth and supports advanced formats.
On the LG OLED TV
- Turn on Simplink.
- Enable eARC if your soundbar supports it.
- Check that the sound output is set to the HDMI audio system.
On the Sony soundbar
- Confirm the soundbar input is set to TV or ARC mode.
- Make sure HDMI control is enabled if the model offers that option.
- Power cycle the soundbar after changing settings.
If CEC communication fails, the TV may not hand off audio properly.
In that case, disconnect both devices from power for one minute, reconnect the HDMI cable, then power on the TV first and the soundbar second.
Match the Audio Format to the Soundbar’s Capabilities
Another common cause is an audio format that the Sony soundbar cannot decode from the LG OLED output setting.
If the TV is set to an incompatible format, you may get no sound, a buzzing signal, or intermittent audio dropouts.
Check the LG OLED digital sound output options and try the following:
- Set Digital Sound Output to Auto for general use.
- If sound is missing, try PCM for basic stereo testing.
- For surround sound systems, test Dolby Digital instead of passthrough.
- Use eARC for Dolby Atmos when the soundbar supports it.
PCM is a useful troubleshooting step because it strips away complex processing and sends a simpler audio signal.
If PCM works but Dolby or Auto does not, the issue is likely format compatibility rather than a broken connection.
Update Firmware on the TV and Soundbar
Firmware mismatches can cause HDMI handshake failures, especially on newer LG OLED and Sony audio products.
A recent update may improve eARC stability, lip-sync behavior, or Dolby format handling.
- Check for LG TV software updates in the settings menu.
- Check for Sony soundbar firmware updates using the manufacturer app or USB update method, depending on model.
- Restart both devices after updating.
This matters more in mixed-brand setups because LG and Sony may release fixes independently.
If one device is updated and the other is not, HDMI ARC communication can become unstable.
Try a Full Reset of the Audio Link
If settings look correct but audio still does not play, reset the connection path completely.
This clears stuck HDMI states that normal restarts do not always fix.
- Turn off the TV and soundbar.
- Unplug both from power for 60 seconds.
- Disconnect the HDMI cable from both ends.
- Reconnect the HDMI cable firmly.
- Plug both devices back in.
- Turn on the LG OLED first, then the Sony soundbar.
- Recheck audio output and ARC/eARC settings.
This sequence often resolves handshake issues, especially after power outages, cable swaps, or input changes.
If the issue started after a software update, a full reset is one of the fastest ways to restore normal communication.
Test the Soundbar Input and Source Device
Sometimes the problem is not the TV-to-soundbar link but the source being played.
Apps, cable boxes, gaming consoles, and streaming devices can all output different audio formats.
- Test with an LG TV built-in app such as Netflix, YouTube, or Prime Video.
- Then test with an external device like a PlayStation, Xbox, or set-top box.
- Switch the Sony soundbar through its available input modes.
- Verify that the TV volume is not muted and the soundbar volume is raised.
If internal apps work but external devices do not, the issue may be with the source’s HDMI output format rather than the soundbar.
Game consoles often default to surround settings that need adjustment for compatibility.
When Optical Audio Is a Better Troubleshooting Step
Optical audio is a good fallback if HDMI ARC or eARC refuses to work.
It does not support the same bandwidth as eARC, but it can confirm whether the soundbar and TV speakers are functioning correctly.
Use optical audio if you want to separate connection problems from decoding problems.
If sound works over optical, the issue is almost certainly tied to HDMI ARC, CEC, or eARC settings.
If there is still no sound, the problem may involve the soundbar input, a faulty cable, or the TV audio output configuration.
Common LG OLED and Sony Soundbar Compatibility Mistakes
Many users run into the same avoidable setup errors.
These are the most frequent ones to check:
- Using the wrong HDMI port on the LG OLED TV.
- Leaving the TV set to internal speakers instead of external audio.
- Disabling Simplink or HDMI-CEC.
- Using a cable that does not support stable ARC or eARC communication.
- Leaving the soundbar on the wrong input mode.
- Setting an unsupported Dolby format instead of PCM or Auto.
These issues are especially common after moving equipment, changing inputs, or replacing a router, power strip, or HDMI cable.
Even if the devices worked before, one menu change can break the audio path.
Best Settings to Use for Most Setups
For a reliable everyday setup with a Sony soundbar and LG OLED TV, use these baseline settings:
- HDMI connection from TV ARC/eARC port to soundbar HDMI ARC port
- Simplink enabled on the LG OLED
- eARC enabled if both devices support it
- Digital sound output set to Auto or PCM for testing
- TV audio output set to external speaker or HDMI ARC
- Soundbar input set to TV/ARC
If you want Dolby Atmos, confirm that both the TV and soundbar support eARC and that the source content is actually encoded for Atmos.
A supported cable and the correct HDMI ports are essential for this to work consistently.
When to Suspect a Hardware Problem?
If you have tested multiple cables, switched audio formats, reset the devices, and verified the HDMI ports, the hardware itself may be at fault.
A damaged HDMI port, failing soundbar amplifier, or defective TV audio output board can all produce a silent system.
Signs of a hardware issue include:
- No sound from any source, including built-in apps and external inputs.
- No response when changing ARC or eARC settings.
- Random audio cutouts that persist after resets.
- Visible damage to the HDMI port or connector.
At that stage, checking warranty coverage or contacting LG and Sony support is the most practical next step.
Provide the exact LG OLED model, Sony soundbar model, HDMI cable type, and the settings you already tested to speed up troubleshooting.