ARC vs eARC: which do you need (and which cables)?

If your device 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. This guide walks you through a clean, methodical reset to get reliable sound again without guessing.

Quick answer

• Power off everything completely and unplug for 30-60 seconds to clear HDMI control state
• Disconnect and reconnect the HDMI cable between TV's eARC/ARC port and your device
• Power on TV first, then your device to establish proper handshake order
• Toggle HDMI-CEC and ARC settings off and back on in both TV and device menus
• Use a certified Ultra High Speed HDMI cable to avoid dropouts

Symptoms

• Built-in TV apps play video but produce no audio through eARC/ARC
• Your device shows "TV Audio" but sound is intermittent or missing entirely
• Audio worked before but stopped after a TV update or app change
• External devices work fine through eARC but built-in apps don't
• Device display shows audio format briefly then goes silent

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 device. On many sets it's only one specific port.
• Use a certified high-speed cable — Old or damaged HDMI cables are a very common cause of eARC dropouts. Swap in a known-good, certified cable if you have one.
• Set TV audio to eARC/ARC — In 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 your device — If the receiver was muted or set to a different input, you won't hear anything from TV apps.

Step-by-step fix

1. Power everything off fully — Turn off the TV and your device, 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 your device. 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 your device. Avoid adapters or wall plates for this test.

4. Power on the TV first, then your device — 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 your device for Dolby Digital, Dolby Atmos, or PCM indicators.

6. Toggle HDMI-CEC / ARC off and on — In both the TV and device menus, go to Settings → HDMI or Settings → Audio and 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 devices 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.

If it still isn't working

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

If you've walked through the reset process, tried multiple apps, and swapped the HDMI cable yet eARC or ARC still refuses to cooperate, document the exact behavior: which TV model you have, which HDMI port is in use, what your device display shows, and which apps fail. Support teams can do much more with that detail than with "no sound from apps," and it drastically shortens the back-and-forth.

FAQ

Q: How do I know if it's a TV issue, device issue, or cable problem? A: TV issue if eARC works from external devices but not built-in apps (check for TV updates). Device issue if it never shows ARC input or keeps dropping to TV speakers (update firmware). Cable issue if sound cuts in and out or only works when you wiggle the cable.

Q: Why does the power-on order matter? A: Many HDMI-CEC systems need the TV to establish itself as the "master" device before the receiver can properly negotiate the eARC connection. Powering the TV first allows this handshake to complete.

Q: What's the difference between ARC and eARC cables? A: ARC works with any HDMI cable, but eARC requires a certified Ultra High Speed HDMI cable to handle the increased bandwidth for lossless audio formats like Dolby Atmos.

Q: Why do built-in apps behave differently than external devices? A: Built-in TV apps use the TV's internal audio processing, while external devices send their own audio signals. The TV's app audio pipeline can have different format restrictions or bugs that don't affect passthrough from external sources.