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 Denon receiver, unplug for 60 seconds, disconnect HDMI cable, reconnect, power TV first then receiver
- Check HDMI connections — Ensure cable connects TV's eARC/ARC port to Denon's ARC-labeled input
- Reset HDMI-CEC — Disable HDMI-CEC/ARC in both devices, then re-enable to force fresh handshake
- Verify TV audio output — Set TV audio to external receiver/soundbar instead of TV speakers
Symptoms
- Denon receiver shows "TV Audio" but produces no sound from built-in TV apps
- Sound works from external devices but not Netflix, YouTube, or other TV apps
- Audio cuts in and out intermittently from streaming apps
- Receiver display doesn't show Dolby Digital, Dolby Atmos, or PCM indicators
Quick checks
- Confirm HDMI connection — Make sure the HDMI cable from TV plugs into the ARC or eARC-labeled HDMI input on your Denon receiver
- Use certified high-speed cable — Old or damaged HDMI cables cause eARC dropouts; swap in a known-good, certified cable
- Set TV audio to eARC/ARC — In TV sound settings, select option that sends audio to external receiver rather than TV speakers
- Check Denon volume and input — Ensure receiver isn't muted and is set to correct input
Step-by-step fix
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Power everything off fully — Turn off TV and Denon receiver, then unplug both from power for 30-60 seconds to clear HDMI control state
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Disconnect HDMI cable — Unplug the cable between TV's eARC/ARC port and Denon receiver while devices are powered off
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Reconnect HDMI cable firmly — Plug cable back into eARC/ARC port on TV and ARC-enabled input on Denon receiver; avoid adapters or wall plates
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Power on in correct order — Turn on TV first and let it boot to home screen, then power on Denon receiver
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Test with simple TV app — Launch built-in app like Netflix or YouTube, play video, and watch Denon's front panel for Dolby Digital, Dolby Atmos, or PCM indicators
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Reset HDMI-CEC and ARC — In both TV and Denon menus, go to Settings → HDMI → disable HDMI-CEC and ARC/eARC, then re-enable both to force fresh handshake
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Check audio format compatibility — If you get silence, change TV audio output from PCM to "Auto" or "Dolby Digital" in Settings → Audio → Digital Output
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Test multiple apps — Try 2-3 different streaming apps; if only one has no sound, check that app's internal audio settings for surround sound
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Disable competing audio outputs — Turn off any paired Bluetooth headphones or speakers that might be stealing audio from eARC
If it still isn't working
Simplify the setup — Temporarily disconnect all other HDMI devices from TV and Denon receiver, then repeat the power cycle and eARC setup with just TV and receiver connected.
Check for updates — Install any available firmware updates for both TV and Denon receiver, as eARC compatibility improves over time.
Document the problem — Note your exact TV model, which HDMI port you're using, what the Denon display shows, and which apps fail before contacting support.
Consider professional help — If eARC still won't cooperate after trying multiple cables and resets, a professional installer can diagnose hardware compatibility issues.
FAQ
Why does eARC work with my streaming stick but not built-in TV apps? This usually indicates a TV firmware or app audio settings issue rather than a receiver problem. Check for TV software updates and verify each app's internal audio settings allow surround sound output.
Should I use eARC or regular ARC? Use eARC if both your TV and Denon receiver support it, as it provides higher bandwidth for Dolby Atmos and uncompressed audio. Regular ARC works fine for standard Dolby Digital.
How do I know if my HDMI cable supports eARC? eARC requires an Ultra High Speed HDMI cable. If sound cuts in and out or only works when you wiggle the cable, replace it with a certified Ultra High Speed cable.
What's the correct power-on sequence for eARC? Always power on the TV first and let it fully boot, then turn on the Denon receiver. Many HDMI-CEC systems are picky about this order and won't establish proper eARC connection otherwise.