What the LG S65Q No Sound Problem Usually Means
The LG S65Q no sound issue can come from the soundbar itself, the TV, the input source, or the HDMI/optical connection between them.
In many cases, the hardware is fine and the problem is caused by a muted setting, an incompatible audio mode, or a failed handshake between devices.
This guide walks through the most common causes and practical fixes so you can isolate the problem quickly.
It also covers settings that often get overlooked on LG TVs, streaming devices, game consoles, and Bluetooth sources.
Start With the Fastest Checks
Before changing advanced settings, confirm the basics.
These quick steps solve many no-audio cases on the LG S65Q and nearby connected devices.
- Raise the volume on both the soundbar and the TV.
- Make sure the soundbar is not muted.
- Confirm the soundbar is powered on and set to the correct input.
- Check whether another source produces audio.
- Look for a blinking or unusual indicator light on the soundbar.
If the soundbar display shows a mode such as HDMI ARC, Optical, Bluetooth, or USB, verify that it matches the device you are trying to use.
A mismatch is one of the most common reasons for audio silence.
Check the Audio Connection Type
The LG S65Q supports multiple connection types, and each one has different failure points.
Identifying the active connection makes troubleshooting much easier.
HDMI ARC or eARC
HDMI ARC is often the preferred setup because it carries audio through a single cable from the TV to the soundbar.
If the TV is not configured correctly, the LG S65Q may appear connected but still produce no sound.
- Use the HDMI port labeled ARC or eARC on the TV.
- Connect the cable firmly at both ends.
- In the TV settings, enable HDMI ARC or Simplink on LG TVs, or the equivalent CEC control on other brands.
- Set the TV audio output to external speakers or HDMI ARC.
If the TV recently updated its firmware, rechecking ARC and CEC settings is important because updates can reset audio behavior.
Optical Digital Audio
An optical connection is reliable, but it only works if the TV is sending the correct digital signal.
A loose optical cable, a bent connector, or the wrong output format can produce silence.
- Remove and reseat the optical cable carefully.
- Confirm the red light is visible at the optical output when disconnected from the soundbar.
- Set the TV audio format to PCM if Dolby Digital is not supported by the source path.
- Check that the optical cable ends are fully inserted and not damaged.
Bluetooth
Bluetooth is convenient, but it is also the most likely to experience pairing or playback issues.
If the LG S65Q connects over Bluetooth but still has no sound, the source device may be sending audio to another output.
- Forget the soundbar on the phone, tablet, or computer.
- Re-pair from scratch.
- Make sure the source device is not paused or muted in its own app.
- Check whether the source output is set to the Bluetooth device and not the internal speaker.
Verify the TV Audio Settings
When the LG S65Q no sound issue happens with a television, the TV’s audio menu is often the root cause.
Even when the cable is correct, the TV may still be trying to use internal speakers.
On LG TVs, check the sound output setting and ensure it is set to HDMI ARC, optical, or external speaker depending on your connection.
Also review the digital sound output format.
- Set Sound Out to HDMI ARC or Optical.
- Disable TV speakers if the menu allows it.
- Set Digital Sound Output to PCM first as a test.
- Turn Simplink on for ARC setups.
If PCM restores sound, the issue may be format compatibility rather than a physical failure.
You can then test Dolby Digital or Auto after confirming basic audio playback works.
Test the Soundbar With Another Source
To determine whether the LG S65Q itself is the problem, test it with a different device.
Connect a phone via Bluetooth, a laptop via HDMI, or another TV via optical if available.
If the soundbar works with one source but not another, the soundbar is likely functioning properly.
That points to the original device, cable, or format setting as the real cause.
- Working on one input but not another suggests a source-side issue.
- No sound on every input suggests a soundbar, power, or firmware problem.
- Intermittent sound may indicate a loose cable or unstable ARC handshake.
Power Cycle the TV and Soundbar
A full power reset can clear temporary communication errors between the TV and the soundbar.
This is especially useful for HDMI ARC issues, where device handshakes can fail after a power outage or firmware update.
- Turn off the TV and the soundbar.
- Unplug both devices from power.
- Wait at least 60 seconds.
- Reconnect power and turn on the TV first, then the soundbar.
- Recheck the audio output setting.
This simple reset often restores audio when the devices are connected correctly but not negotiating the signal properly.
Inspect Cables and Ports for Damage
A bad cable or damaged port can create a no sound symptom even when everything else is configured correctly.
HDMI cables in particular can fail internally without visible wear.
- Try a different HDMI cable rated for ARC or high-speed audio/video use.
- Swap optical cables if you use digital audio.
- Look for bent HDMI pins or loose port fit.
- Check for dust or debris inside the connectors.
If the sound returns after changing the cable, the original cable was likely the issue.
If the port feels loose or only works when moved, the connector may need service.
Update Firmware and Software
Firmware mismatches can cause audio compatibility issues between the LG S65Q, the TV, and external devices.
Keeping both the soundbar and source devices updated reduces the chance of handshake errors and codec problems.
- Check the LG support page for the S65Q firmware.
- Update your TV software through its settings menu.
- Update streaming devices such as Roku, Apple TV, Fire TV, or Chromecast.
- Restart the source device after updating.
After an update, test audio again with a simple source like live TV or a basic streaming app.
That helps rule out app-specific glitches.
Adjust the Source Device Audio Output
The problem is not always the soundbar or TV.
Streaming boxes, game consoles, Blu-ray players, and PCs often control their own audio output, and the wrong selection can lead to silence.
Streaming Devices
- Set audio output to PCM for testing.
- Disable advanced passthrough options if no sound appears.
- Verify the device is not sending audio to another Bluetooth speaker or headset.
Game Consoles and PCs
- Confirm HDMI audio output is enabled.
- Choose stereo PCM as a baseline setting.
- Check system-level volume and app volume separately.
- Disconnect wireless headphones or controllers that may redirect audio.
Reset the LG S65Q If Nothing Else Works
If all other troubleshooting steps fail, a reset may clear a corrupted configuration.
A reset is useful when the soundbar powers on normally but remains silent across multiple inputs.
Before resetting, write down your current settings if possible.
Afterward, you may need to pair the remote, reconnect Bluetooth devices, and reconfigure sound modes.
- Perform a factory reset using the soundbar’s control method in the user manual.
- Reconnect the soundbar to the TV after the reset.
- Retest with one known-good source and cable.
When the Problem May Be Hardware-Related
If the LG S65Q no sound problem continues after testing multiple sources, cables, and settings, hardware failure becomes more likely.
Common signs include no response from the soundbar display, repeated cutouts, or silence on every input type.
Possible hardware issues include a failed amplifier, damaged input board, power supply problems, or a defective speaker component.
In that case, contact LG support or an authorized repair center and provide details about the steps you already tried.
Common Fixes That Resolve LG S65Q No Sound
- Set the TV audio output correctly for HDMI ARC or optical.
- Change digital output to PCM for testing.
- Re-seat or replace the HDMI or optical cable.
- Power cycle both devices fully.
- Re-pair Bluetooth connections from scratch.
- Update firmware on the TV, soundbar, and source device.
- Test the soundbar with a second device to isolate the fault.
By working from the connection type to the source device, you can usually identify why the LG S65Q is silent without replacing parts unnecessarily.