Why is my Samsung S90C sound cutting out?

Common causes include software issues, connectivity problems, and settings misconfigurations. Follow our guide to fix your Samsung S90C.

How do I fix Samsung S90C sound cutting out?

Start by restarting your device, checking connections, and updating firmware. Our step-by-step guide provides detailed instructions.

When should I call support for my Samsung S90C?

If troubleshooting doesn't resolve the issue, or you encounter persistent errors, contact a certified Samsung technician.

Samsung S90C Sound Cutting Out

If you're experiencing Samsung S90C sound cutting out during your favorite shows, movies, or gaming sessions, you're not alone. This frustrating issue can stem from software glitches, HDMI handshake problems, audio format conflicts, or external device interference. The good news: most sound dropouts on the Samsung S90C OLED TV can be resolved with targeted troubleshooting steps. This guide walks you through proven fixes to restore stable, uninterrupted audio.

Quick Fixes for Samsung S90C Sound Cutting Out

Start with these fast solutions before diving into deeper settings. Many users report that simple adjustments eliminate intermittent audio dropouts within minutes.

Power Cycle Your Samsung S90C: Unplug the TV from the wall outlet, wait 60 seconds, then plug it back in. This clears temporary cache and resolves minor software bugs causing sound interruptions. Press and hold the power button on the remote for 5 seconds after plugging back in to complete the reset cycle.

Check and Reseat HDMI Connections: Disconnect all HDMI cables from your S90C, inspect for bent pins or damage, then reconnect firmly. Use certified Ultra High Speed HDMI cables, especially for 4K/120Hz sources. Loose or outdated cables frequently trigger Samsung S90C sound cutting out during high-bandwidth content.

Disable Anynet+ (HDMI-CEC): Navigate to Settings > General > External Device Manager > Anynet+ (HDMI-CEC) and turn it OFF. CEC conflicts between connected devices—particularly soundbars and game consoles—are a leading cause of audio dropouts. Test audio for 10-15 minutes after disabling.

Adjust Digital Audio Output Format: Go to Settings > Sound > Expert Settings > Digital Audio Output. Change from "Auto" to "PCM." Dolby Digital Plus and eARC bitrate fluctuations often cause Samsung S90C sound cutting out when the TV struggles to decode compressed formats in real-time. PCM provides stable, uncompressed stereo output.

Update TV Firmware and Reset Sound Settings: Check for updates at Settings > Support > Software Update > Update Now. Install any pending firmware, then reset audio: Settings > Sound > Expert Settings > Reset Sound. Outdated firmware contains known audio bugs; Samsung regularly patches eARC and HDMI 2.1 stability issues.

Test Internal Speakers vs. External Audio: Temporarily disconnect your soundbar or receiver and use the S90C's built-in speakers. If sound cutting out stops, the issue lies with your external audio chain—try a different eARC port, update the soundbar firmware, or replace the HDMI cable between TV and audio device.

Warning: Avoid repeatedly factory resetting your Samsung S90C as a first response. This erases all settings, app logins, and calibration data without guaranteed results. Exhaust targeted fixes first, and always document your current picture and audio settings before any reset.

Advanced Troubleshooting for Persistent Audio Dropouts

If Samsung S90C sound cutting out continues after basic steps, investigate these deeper causes. Persistent dropouts often indicate hardware compatibility issues or network-related audio streaming problems.

For streaming apps specifically, verify your internet speed meets 25 Mbps for 4K content. Buffering disguised as audio dropout is common—test with a wired Ethernet connection to rule out Wi-Fi interference. If using Samsung's Object Tracking Sound or Dolby Atmos, try disabling these features temporarily; the S90C's neural processing can occasionally stutter with certain content codecs.

Gamers experiencing sound cutting out should check their console's HDMI audio settings. On PlayStation 5, set Audio Output to Linear PCM rather than Bitstream. On Xbox Series X, use Stereo Uncompressed or Dolby Digital under Audio Options. Variable Refresh Rate (VRR) and Auto Low Latency Mode (ALLM) can sometimes conflict with audio sync—test with Game Mode off to isolate the issue.

Frequently Asked Questions

Why does my Samsung S90C sound cut out only with my soundbar connected?

This points to an eARC/ARC handshake or format mismatch. Ensure your soundbar supports the same audio formats as your content source. Update both devices' firmware, use the TV's HDMI 3 port (designated eARC), and set Digital Audio Output to PCM as a test. Samsung's Q-Symphony feature can also conflict with third-party soundbars—disable it under Sound Settings.

Does the Samsung S90C have known sound issues with firmware 1803 and later?

Samsung acknowledged intermittent audio dropouts in select 2023 firmware builds, particularly affecting eARC stability and Dolby Atmos playback. Check Settings > Support > About This TV for your firmware version. If running a problematic build, Samsung typically releases patches within 2-4 weeks—enable Auto Update to receive fixes promptly.

Can a faulty One Connect box cause Samsung S90C sound cutting out?

Yes. The S90C routes all connections through the external One Connect box, and a failing unit can produce intermittent audio, video, or both. Test by gently wiggling the optical cable between TV panel and One Connect box—if dropouts worsen, contact Samsung for warranty replacement. The One Connect box carries a 1-year standard or 3-year extended warranty.

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