Denon receiver eARC/HDMI no sound - how to fix it

Denon receivers are popular for home theater setups, but eARC and HDMI audio can suddenly stop working when CEC handshakes fail, audio formats conflict, or cables cannot handle the bandwidth. If your Denon receiver shows it is connected but produces no sound from TV apps, here is how to fix it.

Quick answer

• Power cycle everything — Unplug TV and Denon receiver for 60 seconds, disconnect the HDMI cable between them
• Use the correct HDMI output — Connect from the Denon's HDMI Monitor/OUT port to the TV's eARC port
• Reset HDMI Control — Menu → Video → HDMI Setup → HDMI Control → Off, wait, then On
• Check audio input — Make sure the Denon is set to the TV Audio input when playing TV apps

Symptoms

• Denon receiver shows signal from TV but plays no sound
• eARC worked previously but stopped after a firmware update or power outage
• Audio drops in and out every few minutes during streaming
• TV apps are silent through the receiver but streaming devices plugged into the Denon work fine
• Receiver display shows "TV Audio" with no audio output

Quick checks

• Confirm the HDMI connection — HDMI cable should go from the Denon's HDMI OUT (Monitor) port to the ARC/eARC-labeled port on your TV
• Check the HDMI cable — Old or budget cables cannot reliably handle eARC bandwidth. Use a certified 48Gbps cable
• Verify the input — Press the TV Audio button on the Denon remote or select "TV Audio" input on the front panel
• Check TV audio output — In your TV's sound settings, set output to "Receiver" or "ARC/eARC"
• Unmute the receiver — Check that the Denon is not muted and volume is at an audible level

Step-by-step fix

1. Power off and unplug everything Turn off the Denon receiver and TV, then unplug both from power for 60 seconds.

2. Disconnect the HDMI cable Remove the HDMI cable from the Denon's HDMI OUT port and the TV's eARC port during the power-off window.

3. Reconnect the cable Plug the HDMI cable firmly into the Denon's HDMI Monitor/OUT port and the TV's eARC-labeled HDMI port.

4. Power on the TV first Turn on your TV and wait for it to reach the home screen, then power on the Denon receiver.

5. Reset HDMI Control on the Denon Menu → Video → HDMI Setup → HDMI Control → set to Off, wait 10 seconds, set to On. Also enable ARC in the same menu.

6. Enable eARC mode Menu → Video → HDMI Setup → ARC → set to On. If your Denon model has a separate eARC setting, enable that too.

7. Set the correct input Select "TV Audio" as the input source on the Denon receiver. This is the input that receives audio from the TV's eARC/ARC connection.

8. Test audio playback Open a streaming app on your TV and play content. The Denon's display should show the incoming audio format (Dolby Digital, Atmos, PCM).

If it still isn't working

Replace the HDMI cable — Denon receivers push a lot of data through eARC and are very cable-sensitive. A certified Ultra High Speed HDMI cable (paid link) is the most common fix for intermittent audio dropouts.

Update Denon firmware — Menu → General → Firmware → Check for Update. Denon regularly patches HDMI and eARC bugs, especially for handshake issues with specific TV brands.

Disconnect other HDMI sources — Unplug all devices from the Denon except the TV connection. CEC conflicts between game consoles, streaming devices, and the TV can block eARC audio routing.

Test with a different TV — If possible, connect the Denon to another TV to determine whether the issue is the receiver or the TV. If the Denon works on another TV, your primary TV may need a firmware update.

Consider upgrading your receiver — Older Denon models (pre-2020) support ARC but not eARC. If you are trying to pass Dolby Atmos from TV apps, you need an eARC-capable receiver. The Denon AVR-X1800H and newer models support full eARC with HDMI 2.1.

Thinking About Upgrading Your AV Receiver?

If your receiver is causing recurring HDMI, eARC, or audio issues, it may be worth evaluating whether a newer model solves the problem at the hardware level. Our best AV receivers under $500 guide covers current picks with HDMI 2.1, eARC, and Dolby Atmos — including the Denon AVR-S770H and Yamaha RX-V4A which handle modern 4K/120Hz passthrough reliably.

FAQ

Which HDMI port do I connect on the Denon? Always use the HDMI OUT (Monitor) port on the Denon receiver, not one of the HDMI IN ports. The OUT port connects to your TV and handles eARC/ARC audio return.

Why does the Denon show "TV Audio" but play no sound? The receiver detects the TV connection but is not receiving audio data. This is usually a handshake issue fixed by power cycling with cable disconnect, or a cable that cannot handle eARC bandwidth.

Does my Denon receiver support eARC? Denon AVR-X series models from 2020 onward (X1700H, X2700H, X3700H and newer) support eARC. Older models support standard ARC only, which limits you to compressed Dolby Digital 5.1.

Can I use optical instead of HDMI ARC? Yes, as a fallback. Connect an optical cable from the TV to the Denon's optical input and select that input. You will be limited to Dolby Digital 5.1 — no Dolby Atmos or uncompressed audio.