Symptoms
- Soundbar shows no signal over HDMI even though it's connected
- TV audio settings don't list the soundbar as an option
- Sound worked over HDMI before but stopped after a TV update
- Video works fine but no audio passes through HDMI
Likely causes
- CommonSoundbar plugged into a non-ARC HDMI portOnly one HDMI port on a TV (usually labeled ARC or eARC) supports audio return.
- CommonHDMI-CEC or ARC disabled in TV settingsARC requires CEC-related settings to be turned on, which vary by TV brand (e.g., Anynet+, Bravia Sync, SimpLink).
- PossibleTV audio output not set to ARC/eARC deviceEven with ARC enabled, the TV's sound output menu needs to select the external speaker option.
- PossibleFaulty or non-compliant HDMI cableOlder or damaged cables may not support ARC/eARC bandwidth requirements.
- Less commonTV or soundbar firmware bugCompatibility bugs between specific TV and soundbar models have occurred after software updates.
What to do
- Confirm the soundbar is connected to the HDMI port on the TV specifically labeled ARC or eARC.
- Enable HDMI-CEC (may be called Anynet+, Bravia Sync, SimpLink, or similar depending on brand) in the TV's settings.
- In the TV's sound settings, set the audio output to 'HDMI ARC' or the external speaker/soundbar option.
- Try a different HDMI cable, ideally one labeled 'high speed' or 'premium high speed' for eARC support.
- Power cycle both the TV and soundbar by unplugging them for a minute.
- Check for firmware updates on both the TV and soundbar.
- As a workaround, connect via optical audio cable if ARC continues to fail.
Tools and parts
HDMI cable (high speed / eARC compatible)Search: “high speed hdmi cable earc”
When to call a pro
If ARC still fails after confirming the correct port, cable, and settings, this may be a compatibility issue best resolved through the manufacturer's support or by using optical audio instead.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.