Denon receiver: eARC/ARC not working - how to get sound back

If your Denon receiver suddenly stopped sending sound over eARC or ARC from built-in TV apps, you're not alone — this happens more often than you'd think. HDMI-CEC, eARC, and app updates all interact in strange ways, so a small change in one place can mute the whole setup.

Quick answer

• Power cycle everything: Turn off TV and receiver, unplug for 30-60 seconds, disconnect HDMI cable during power off
• Reconnect properly: Plug HDMI cable back into TV's eARC/ARC port and receiver's ARC-labeled input
• Power on in order: TV first, then Denon receiver after TV reaches home screen
• Reset HDMI-CEC: Turn off HDMI-CEC/ARC in both devices, then turn back on to force fresh handshake

Symptoms

• Denon receiver shows "TV Audio" but plays no sound or intermittent audio
• Sound works from external devices but not built-in TV apps
• eARC connection randomly drops out or stops working after TV updates
• Receiver display shows no audio format indicators when playing TV app content

Quick checks

• Confirm the HDMI connection: Make sure the HDMI cable from the TV is plugged into the ARC or eARC-labeled HDMI input on your Denon receiver. On many sets it is only one specific port.
• Use a certified high-speed cable: Old or damaged HDMI cables are a very common cause of eARC drop-outs. Swap in a known-good, certified cable if you have one.
• Set TV audio to eARC/ARC: In the TV sound settings, select the option that sends audio to an external receiver or soundbar rather than the TV speakers.
• Turn the volume up on the Denon receiver: It sounds obvious, but if the receiver was muted or set to a different input, you will not hear anything from TV apps.

Step-by-step fix

1. Power everything off fully: Turn off the TV and the Denon receiver, then unplug them from power for 30-60 seconds. This clears the HDMI control state.

2. Unplug the HDMI cable during the power off: Disconnect the cable between the TV eARC/ARC port and the Denon receiver. Waiting a few seconds helps the devices forget the old link.

3. Plug the HDMI cable back in firmly: Re-connect the cable to the eARC/ARC port on the TV and the ARC-enabled input on the Denon receiver. Avoid adapters or wall plates for this test.

4. Power on the TV first, then the Denon receiver: Let the TV boot to the home screen before turning on the receiver. Many HDMI-CEC systems are picky about power-on order.

5. Open a simple TV app and test: Launch a built-in app like Netflix or YouTube and play a video. Give it a few seconds to negotiate audio. Watch the front panel of the Denon receiver for Dolby Digital, Dolby Atmos, or PCM indicators.

6. Toggle HDMI-CEC / ARC off and on: In both the TV and Denon receiver menus, temporarily disable HDMI-CEC and ARC/eARC, then turn them back on. This often forces a fresh handshake.

7. Check audio formats and app settings: Some Denon models are picky about multichannel PCM or Dolby Atmos. If you get silence, try forcing the TV to output Dolby Digital or "Auto" instead of PCM only.

8. Test with multiple apps: Try at least two or three streaming apps. If only one app has no sound, open its internal audio or playback settings and confirm surround sound is enabled.

9. Disable Bluetooth audio temporarily: If the TV is paired with Bluetooth headphones or a speaker, it may route sound there instead of to eARC.

Expert tip: For stubborn eARC issues, temporarily disconnect all other HDMI devices from the TV and Denon receiver, then repeat the power-cycle and eARC setup. This strips the system down to one TV and one Denon receiver, making it easier to see whether a game console or streaming box was confusing HDMI-CEC.

If it still isn't working

Document the exact behavior: which TV model you have, which HDMI port is in use, what the Denon receiver display shows, and which apps fail. Support teams for Denon and your TV manufacturer can do much more with that detail than with "no sound from apps."

Check for specific issues:

• TV issue: If eARC works from external devices but not from built-in apps, check for TV software updates
• Denon receiver issue: If the receiver never shows an ARC/eARC input, look for firmware updates and verify ARC is enabled on that HDMI input
• Cable issue: If sound cuts in and out or only works after wiggling the cable, replace with a certified Ultra High Speed HDMI cable

In stubborn cases, a professional installer or warranty evaluation may be worth considering, especially if you also see HDMI issues with other sources.

FAQ

Why does eARC work with my streaming stick but not TV apps? Built-in TV apps use different audio processing than external devices. The TV's internal audio routing may have different format limitations or settings that conflict with your Denon receiver.

Do I need a special HDMI cable for eARC? Yes, eARC requires an Ultra High Speed HDMI cable. Regular high-speed cables work for standard ARC but may cause dropouts with eARC's higher bandwidth requirements.

Why does the connection work after unplugging everything? HDMI-CEC creates persistent control links between devices. A full power cycle clears these connections and forces the devices to renegotiate from scratch, often resolving conflicts.

Should I turn off HDMI-CEC completely? Not necessarily. HDMI-CEC enables convenient features like automatic input switching. Try toggling it off and back on first — this usually resolves handshake issues without losing the functionality.