In this guide
Your TV is not controlling your soundbar with CEC because CEC is disabled on one or both devices, the soundbar is not connected to the TV’s HDMI ARC port, or a poor cable is breaking the handshake.
- CEC is enabled on both TV and soundbar
- Soundbar is plugged into the HDMI ARC or eARC port
- A high-speed HDMI cable is used
- TV audio output is set to the soundbar
- CEC is disabled or was reset by a firmware update
- Soundbar is on a non-ARC HDMI input
- Cable is low quality or damaged
- Soundbar is prioritizing Bluetooth over HDMI ARC
The Most Common Causes
CEC relies on a chain of correct settings and hardware. If any link breaks, the TV remote stops controlling the soundbar. The three most common culprits are: CEC turned off, wrong HDMI port, and a cable that doesn’t carry the CEC signal reliably.
Step-by-Step Fix
- Enable CEC on both devices. TV brands use different names — Anynet+ (Samsung), SimpLink (LG), System Audio Control (TCL), Bravia Sync (Sony). Check your soundbar menu too.
- Use the correct HDMI port. Connect the soundbar only to the port labelled ARC or eARC on the TV. Standard HDMI ports do not carry the ARC audio return signal.
- Swap to a high-speed HDMI cable. Budget or old cables drop the CEC data line. Use a cable rated High Speed or Premium High Speed.
- Set TV audio output to the soundbar. Go to TV sound settings and select HDMI ARC or external speakers as the audio output.
- Power cycle both devices. Unplug both the TV and soundbar from the wall for 30 seconds, then reconnect. Power the TV on first, then the soundbar.
- Disable conflicting sources. If the soundbar is connected via Bluetooth at the same time, it may ignore the HDMI ARC input. Switch the soundbar input manually to HDMI ARC.
- Check for firmware updates. CEC settings can reset after a firmware update. Re-enable CEC after any software update on either device.
Quick Reference Table
| Setup | Works? | Need | Note |
|---|---|---|---|
| HDMI ARC port, CEC on, high-speed cable | Yes | Nothing extra | Standard working setup |
| HDMI ARC port, CEC off on TV | No | Enable CEC in TV menu | Brand name varies |
| Standard HDMI port (no ARC) | No | Move cable to ARC port | ARC label on port |
| ARC port, cheap cable | Unreliable | High-speed HDMI cable | CEC line may drop |
| Soundbar on Bluetooth input | No | Switch soundbar to HDMI ARC | Bluetooth overrides ARC |
CEC and HDMI Compatibility Notes
CEC is part of the HDMI standard, but it only works over the ARC or eARC port. If you are already using a USB-C to HDMI adapter elsewhere in your setup, check our guide on why USB-C to HDMI stops working — adapter quality affects signal integrity in the same way. For more background on how HDMI carries audio and control signals, the TCL official soundbar troubleshooting guide walks through CEC setup in detail. Also see our article on whether USB-C can connect to HDMI if you are mixing connection types in your home theatre setup.
Bottom line: A TV not controlling a soundbar with CEC almost always comes down to CEC being disabled, the wrong HDMI port, a poor cable, or the soundbar being on the wrong input. Enable CEC on both devices, plug into the ARC port with a high-speed HDMI cable, power cycle both units, and the TV remote should take control within seconds.