Why Does My Sonos Arc Keep Dropping From HDMI eARC Every Night

Problem Description

Sonos Arc users often see eARC drop overnight and require a morning reset. This guide explains the HDMI CEC and TV sleep interactions that cause the drop, plus the settings to make Arc hold eARC reliably through sleep cycles.

Symptoms

• Arc loses audio every morning
• TV shows Arc input is missing
• Sonos app reports Arc disconnected
• eARC indicator on TV goes off overnight
• Reboot restores audio until next night
• HDMI CEC enabled on all devices

Recognize these? Here's what usually causes it.

Common Causes

• TV CEC sleep disables eARC output
• Other CEC devices trigger sleep command
• TV auto power save ends eARC handshake
• Older HDMI cable passes eARC but barely
• Receiver in chain breaks passthrough
• Firmware mismatch between TV and Arc

Tools & Requirements

Step-by-Step Solution

1

Check TV Sleep Settings

Open your TV settings and review any power save, eco, or quick sleep options. Many TVs aggressively shut down HDMI eARC to save power overnight, which drops Sonos Arc audio. Disable auto eco sleep or set it to the longest allowed time to test.

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2

Audit CEC Devices

Look at every device connected via HDMI that supports CEC. Extra devices can issue a sleep or power off command overnight that silently breaks eARC. Disable CEC on streaming devices you rarely use or leave them powered off when not actively streaming.

3

Upgrade HDMI Cable

Replace the HDMI cable between TV and Arc with a certified Ultra High Speed cable. Older cables sometimes pass eARC at setup but fail under a cold connection attempt in the morning. A known good certified cable eliminates cable borderline issues.

4

Use Direct TV to Arc

Bypass any receiver or HDMI switch between the TV and Arc. Run Arc straight to the TV eARC port. If the drop stops, the receiver or switch lacks proper eARC passthrough. Consider upgrading to a device with verified eARC support.

5

Firmware and Toggle

Confirm TV firmware and Sonos software are current. If drops continue, turn off CEC in Sonos app settings to rely only on TV-initiated eARC. Many users find disabling Sonos CEC while keeping TV-side CEC solves the overnight disconnect without losing features.

Quick Solutions

Still having issues? This is usually the deeper cause below.

Need More Help? Sonos Support

Note: The contact information below connects you directly to Sonos's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.