LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV AUDIO SYNC Error Fix: Audio Out of Sync with Video

Error code AUDIO SYNC on the LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV means: Audio Out of Sync with Video. Audio and video noticeably out of sync (lip-sync issues). Common with ARC/eARC, Bluetooth audio, and streaming apps. For ARC/eARC: enable "AV Sync Adjustment" in Settings → Sound → Additional Settings. For Bluetooth, inherent latency 100-200ms. For streaming apps, clear cache or restart. For game consoles, enable Game Mode to reduce input lag.

The most successful fix is "Update TV Firmware and Adjust Game Mode Settings" (medium difficulty, ~30 minutes). This fix costs nothing. HomeMD has 2 community-ranked fixes for this error.

This error is rated low severity. It is generally not urgent and can often be resolved with a simple DIY fix.

Yes — the top-ranked community fix ("Update TV Firmware and Adjust Game Mode Settings") is rated medium difficulty and takes about 30 minutes. Tools needed: LG TV remote, Internet connection.

DIY cost: $0. Professional repair typically costs $100-$150. Many homeowners save money by trying the top-ranked community fix first.

The LG TV & Audio OLED55B3PUA 55" Class B3 4K OLED Smart TV has 8 other known error codes, including: ABNORMAL TEMP (OLED Panel Over-Temperature), APP CRASH (App Freezes or Crashes), BANDING (Horizontal or Vertical Banding), BLINK 2X (Power Supply Overcurrent / Short), BLINK 3X (Main Board Failure), and 3 more.

Error code AUDIO SYNC also appears on 6 other LG TV & Audio models: 55UQ7570PUJ 55" Class UQ75 Series 4K UHD Smart TV, 75NANO75UQA 75" Class NanoCell 75 Series 4K Smart TV, 86QNED80URA 86" Class QNED80 4K QNED MiniLED Smart TV, OLED65C3PUA 65" Class C3 4K OLED evo Smart TV, OLED65C4PUA 65" Class C4 4K OLED evo Smart TV, OLED65G3PUA 65" Class G3 4K OLED evo Gallery Edition Smart TV. The fix may vary by model, so check each model's specific page for tailored repair steps.