LG TV No Sound Through Receiver: What Usually Causes It
If you are dealing with LG TV no sound through receiver, the problem is usually caused by a connection, format, or settings mismatch rather than a failed speaker system.
The good news is that most cases can be resolved by checking a few specific LG webOS and receiver settings.
When audio does not pass from an LG television to a Denon, Yamaha, Sony, Onkyo, Pioneer, Marantz, Samsung, or other AV receiver, the issue often involves HDMI ARC, eARC, optical output, or the TV’s Sound Out configuration.
Check the Connection Type First
The first step is to identify how the TV is supposed to send audio to the receiver.
Each method has different requirements, and a mismatch can stop sound completely.
- HDMI ARC: Uses an HDMI port labeled ARC on the TV and receiver.
- HDMI eARC: Supports higher-bandwidth audio formats such as Dolby Atmos and DTS-HD in some setups.
- Optical digital audio: Uses a TOSLINK cable and is common on older receivers.
- Bluetooth: Less common for home theater, but sometimes used for wireless audio.
If your receiver is connected by HDMI, make sure both ends are in the correct ARC-enabled ports.
If you are using optical, confirm that the cable is fully seated and that the TV is outputting audio through optical rather than internal speakers.
Verify the LG TV Sound Out Setting
On LG TVs, the audio output route is controlled through the Sound Out menu.
If this setting remains on TV Speaker, the receiver will not get audio even if the cables are correct.
Steps to check Sound Out
- Open Settings on the LG TV.
- Go to Sound.
- Select Sound Out.
- Choose HDMI ARC, Optical, or the appropriate receiver output.
If the TV offers LG Sound Sync, HDMI ARC, or External Speaker, select the option that matches your connection.
A wrong selection here is one of the most common reasons an LG TV has no sound through receiver systems.
Confirm ARC or eARC Is Enabled on the LG TV
ARC and eARC do not always work automatically.
On many LG models, the feature must be enabled in the settings before the TV will send audio to the receiver.
Settings to check on LG webOS
- Go to Settings.
- Open All Settings if needed.
- Choose Sound.
- Look for Advanced Settings or Additional Settings.
- Enable HDMI-CEC, often called Simplink on LG TVs.
- Enable eARC Support if both devices support it.
Simplink is LG’s HDMI-CEC implementation.
If it is off, the TV may not properly communicate with the receiver, even when the cable is connected correctly.
Check the Receiver Input and Audio Mode
Many receiver issues are caused by the input being on the wrong source or the receiver not set to the proper audio mode.
The receiver may show video but still fail to process incoming TV audio.
- Make sure the receiver input matches the HDMI or optical connection from the TV.
- Confirm the receiver is not muted.
- Check that the receiver volume is raised enough to hear output.
- Look for audio modes such as Auto, Direct, or PCM and try changing them if sound is missing.
Some AV receivers struggle with compressed audio formats if they are set to a mode that does not match the TV output.
Switching the receiver to Auto or PCM can restore audio in many cases.
Try Changing the LG TV Digital Sound Output
LG TVs often allow several digital audio output formats.
If the format is incompatible with the receiver, audio may cut out or never appear.
Common output formats
- PCM: The most compatible option and often the best first test.
- Auto: Lets the TV choose the format automatically.
- Pass Through: Sends the original signal to the receiver when supported.
If you have no sound through receiver equipment, change the LG TV digital sound output to PCM temporarily.
If audio returns, the problem is likely a format compatibility issue rather than a hardware failure.
Inspect HDMI Cables and Ports
A damaged cable or incorrect port can cause the TV and receiver to fail silently.
HDMI ARC requires the cable to be connected to the proper ARC-labeled port on both devices.
- Use a certified High Speed or Ultra High Speed HDMI cable.
- Connect the TV to the receiver’s ARC or eARC port.
- Test a different HDMI cable if sound is missing.
- Try another HDMI port on the receiver if ARC is not required.
If the TV and receiver work with video but not audio, the cable may still be the issue.
HDMI cables can fail on audio channels while continuing to pass image signals.
Restart Both Devices and Reset the HDMI Handshake
LG TVs and receivers rely on an HDMI handshake to exchange audio and control information.
When that handshake fails, restarting both devices often fixes the issue.
Power reset method
- Turn off the TV and receiver.
- Unplug both devices from power.
- Disconnect the HDMI or optical cable for one minute.
- Reconnect everything securely.
- Power on the receiver first, then the TV.
This simple reset can clear a stuck Simplink, ARC, or eARC handshake and restore sound immediately.
Update Firmware on the TV and Receiver
Firmware mismatches can create compatibility problems between an LG television and an AV receiver.
This is especially common after one device receives an update and the other does not.
Check for updates in the LG TV software menu and in the receiver’s system settings or manufacturer app.
Brands such as LG, Denon, Yamaha, Sony, and Marantz frequently release firmware fixes for ARC, eARC, and CEC communication.
Common LG TV Audio Settings That Can Block Receiver Sound
Several lesser-known settings can interrupt audio output even when the connection is correct.
- TV Speaker enabled: The TV may still send sound locally instead of to the receiver.
- Simplink disabled: Breaks HDMI-CEC communication needed for ARC in many setups.
- eARC incompatibility: Some older receivers cannot handle eARC and work better with standard ARC.
- Audio format too advanced: Dolby Atmos or other formats may require better device support.
- Input label confusion: The receiver may be on the right cable but wrong input profile.
When Optical Is Better Than HDMI ARC
If HDMI ARC remains unreliable, optical audio can be a practical fallback.
Optical does not carry advanced control features like HDMI-CEC, but it is often stable and easy to troubleshoot.
Optical is a good choice when:
- The receiver is older and does not support ARC or eARC.
- HDMI-CEC causes random audio dropouts.
- The TV and receiver negotiate ARC poorly.
Keep in mind that optical usually does not support the highest-bandwidth audio formats found on newer streaming apps and Blu-ray sources.
Check App-Specific Audio Behavior
Sometimes the TV sound works through the receiver on one app but not another.
Streaming apps such as Netflix, Disney+, Prime Video, and YouTube can output different audio formats depending on the content.
If only certain apps fail, test these items:
- Change the LG TV digital output to PCM.
- Disable and re-enable HDMI ARC or eARC.
- Try a different title with standard stereo audio.
- Check whether the receiver supports the app’s audio format.
This is especially useful when Dolby Atmos, Dolby Digital Plus, or multichannel PCM causes compatibility problems in a mixed-device setup.
How to Narrow the Problem Quickly
Use a simple process to isolate whether the issue is in the TV, receiver, cable, or settings.
- Set LG Sound Out to the correct external output.
- Switch digital audio output to PCM.
- Confirm Simplink or HDMI-CEC is enabled.
- Check the receiver input and mute status.
- Try a different HDMI or optical cable.
- Restart both devices and retest.
If sound returns after changing to PCM, the devices are connected correctly and the issue is likely an audio format mismatch.
If no sound returns after cable and settings checks, test the receiver with another source, such as a game console or streaming device, to determine whether the receiver input is functioning.
When to Suspect a Hardware Fault
After you have verified cables, settings, firmware, and input selection, a hardware fault becomes more likely.
Possible failures include a bad HDMI ARC port, damaged optical output, or a malfunctioning receiver audio board.
Signs of a hardware issue include:
- Audio never works on any source through the same receiver input.
- The TV fails to detect the receiver at all.
- The ARC port works intermittently regardless of cable changes.
- Optical output also fails with a known-good cable.
If the receiver works with other devices but not the LG TV, the issue is probably in the TV’s output settings or ARC/eARC path.
If the TV works with another receiver, the original receiver is likely the source of the problem.