LG S95TR eARC Not Working: What Usually Causes It
If your LG S95TR eARC not working issue appeared after setup, a TV update, or a device change, the problem is usually in the HDMI handshake rather than the soundbar itself.
The most common causes are incorrect TV audio output settings, a cable that does not meet HDMI 2.1 requirements, or a mismatch between the source device and the television’s eARC implementation.
eARC, or Enhanced Audio Return Channel, is designed to carry higher-bandwidth audio such as Dolby Atmos, Dolby TrueHD, and DTS formats over a single HDMI cable.
When it fails, users often get no sound, stereo-only audio, delayed audio, or intermittent dropouts.
How LG S95TR eARC Works
The LG S95TR uses the TV as the audio hub when connected through the eARC port.
The television receives video from your streaming device, game console, or cable box, then sends audio back to the soundbar through the HDMI eARC connection.
For this chain to work, three parts must agree on the connection:
- The TV must have eARC enabled.
- The soundbar must be connected to the TV’s designated HDMI eARC port.
- The source and TV must negotiate a compatible audio format.
LG TVs, Samsung TVs, Sony Bravia models, and other modern displays all handle eARC differently, so the same soundbar can behave well on one set and fail on another.
Check the HDMI Connection First
Start with the physical setup, because a loose cable or wrong port is the fastest way to break eARC.
The S95TR should be connected to the TV’s HDMI port labeled eARC or ARC, not an ordinary HDMI input.
- Power off the TV, soundbar, and source devices.
- Disconnect and firmly reconnect the HDMI cable at both ends.
- Use the HDMI port on the TV marked eARC/ARC.
- Try a different high-speed HDMI cable if the issue continues.
For reliable audio passthrough, use a certified Ultra High Speed HDMI cable or a quality Premium High Speed HDMI cable.
Older cables may work for video but fail to maintain a stable eARC handshake, especially with Dolby Atmos or 4K HDR signals.
Verify the TV Audio Settings
Many LG S95TR eARC not working cases come from a TV menu setting rather than a hardware fault.
Open your TV’s sound settings and confirm that the audio output is directed to the HDMI eARC device instead of internal speakers.
On many LG OLED and LG QNED models, useful settings include:
- Sound Output: HDMI ARC/eARC or External Speaker
- eARC Support: On
- Digital Sound Output: Pass Through or Auto
- Simplink (HDMI-CEC): On
If you are using a Sony, Samsung, TCL, Hisense, or Panasonic TV, the labels may differ, but the goal is the same: route audio externally and allow HDMI-CEC control.
Disabling HDMI-CEC often breaks eARC behavior because many televisions rely on that control channel for device negotiation.
Update Firmware on the TV and Soundbar
Firmware mismatches are a common but overlooked cause of eARC failures.
Both the TV and the LG S95TR should be running the latest available software because HDMI handshake bugs are often fixed through updates.
Check for updates on the television first, then update the soundbar through the LG ThinQ app or the manufacturer’s support process.
After updating, power cycle everything to force a new handshake.
- Turn off the TV and soundbar.
- Unplug both from power for 60 seconds.
- Reconnect the HDMI cable.
- Power on the TV first, then the soundbar.
This sequence helps the television detect the S95TR as the active audio device during startup.
Confirm HDMI-CEC Is Enabled
eARC usually depends on HDMI-CEC, which allows devices to control each other over HDMI.
LG calls this feature Simplink, while other brands use names such as Anynet+, Bravia Sync, VIERA Link, or EasyLink.
If HDMI-CEC is disabled, the TV may fail to recognize the soundbar or may revert to internal audio.
Re-enable it in the TV settings and restart both devices.
In some cases, turning CEC off and back on refreshes a stuck handshake.
Adjust the Audio Format Settings
Audio format mismatches can make eARC appear broken even when the cable and ports are fine.
Some TVs and streaming devices default to a format that the chain cannot pass correctly, especially if the TV is set to PCM stereo instead of passthrough.
Use these settings as a baseline:
- TV digital audio output: Pass Through, Auto, or Bitstream
- Streaming device audio output: Auto or Best Available
- Game console audio format: Dolby Atmos or Bitstream, if supported
If the soundbar receives only stereo audio, test with a known Atmos title on Netflix, Disney+, Apple TV+, or a 4K Blu-ray disc.
If Atmos works there but not in games or cable TV, the issue is likely the source device’s output format, not the LG S95TR.
Test for TV Compatibility Issues
Not every television handles eARC equally well.
Some models support eARC only on one HDMI port, while others support it but have limitations with Dolby TrueHD, DTS:X, or multichannel LPCM.
This matters because the LG S95TR is designed for premium audio formats and may expose weaknesses in a TV’s passthrough implementation.
Check your TV manual for these details:
- Which HDMI port supports eARC
- Whether Dolby Atmos passthrough is supported
- Whether DTS passthrough is supported
- Whether the TV supports 5.1 or 7.1 PCM over eARC
If the television is older or only partially supports eARC, the soundbar may work better with a direct source-to-soundbar connection for testing, or with the source connected through the TV only after confirming format support.
Try a Different Source Device
When LG S95TR eARC not working happens with one device but not another, the problem is usually isolated to the source.
A Roku, Apple TV 4K, PlayStation 5, Xbox Series X, NVIDIA Shield, or cable box can each behave differently depending on its audio settings.
Test at least two sources:
- One streaming app built into the TV
- One external device connected by HDMI
If the built-in TV app sends sound correctly but the external device does not, adjust the source device’s audio output.
Game consoles, in particular, may need their audio mode changed from PCM to Bitstream or Dolby Atmos.
Look for Interference from Sound Modes and External Devices
Sound processing features can occasionally interfere with eARC stability.
Disable any temporary audio enhancements, equalizer presets, or advanced TV sound modes if the signal cuts in and out.
Also check whether another HDMI device is connected through an AV receiver, HDMI switch, capture card, or splitter.
These accessories can disrupt eARC because they may not fully support the protocol.
For troubleshooting, connect the LG S95TR directly to the TV with no intermediary hardware.
Reset the HDMI Handshake
If the setup has been changed several times, the devices may be stuck in a bad handshake state.
A full reset often resolves this.
- Turn off the TV and LG S95TR.
- Unplug them from power.
- Remove all other HDMI devices temporarily.
- Wait at least one minute.
- Reconnect the S95TR to the TV’s eARC port.
- Power on the TV first, then the soundbar.
This method is especially useful after firmware updates, power outages, or cable swaps.
When to Suspect a Hardware Problem
If every setting is correct, multiple HDMI cables have been tested, and the LG S95TR still refuses to work through eARC, the issue could involve the TV’s HDMI board, the soundbar’s HDMI input, or an internal software fault.
Signs of a hardware-level problem include persistent no-audio behavior across different sources, repeated disconnects, or the TV never detecting the soundbar at all.
Before contacting support, collect the following details:
- TV model and firmware version
- Soundbar firmware version
- HDMI cable type and length
- Source devices tested
- Exact symptom, such as no sound, stereo only, or intermittent dropouts
That information helps LG support or the TV manufacturer identify whether the issue is caused by compatibility, configuration, or defective hardware.
Best Practice Settings for Stable eARC Performance
For the most reliable day-to-day setup, use a direct TV-to-soundbar connection, keep firmware current, and leave HDMI-CEC enabled.
On most systems, the following combination gives the best results:
- TV sound output: HDMI eARC
- eARC: On
- HDMI-CEC: On
- Digital audio output: Pass Through or Auto
- Cable: Certified high-speed HDMI
With those settings in place, the LG S95TR should be able to handle modern formats such as Dolby Atmos with fewer dropouts and fewer device recognition issues.