LG TV & Audio OLED65C4PUA 65" Class C4 4K OLED evo Smart TV NO AUDIO Error Fix: No Sound from TV Speakers

Error code NO AUDIO on the LG TV & Audio OLED65C4PUA 65" Class C4 4K OLED evo Smart TV means: No Sound from TV Speakers. TV displays picture but no sound from internal speakers. Check TV is not muted. Check volume level. Verify Sound Out is set to "TV Speaker" — may be set to HDMI ARC or Bluetooth if previously paired. Try Digital Sound Out format change (PCM vs Auto). Perform sound test: Settings → Support → Additional Settings → Sound Test. If no audio on sound test, internal amplifier or speakers may have failed.

The most successful fix is "Test and Replace Internal Speaker or Amplifier Board" (hard difficulty, ~90 minutes). Estimated DIY cost: $0-$20. HomeMD has 2 community-ranked fixes for this error.

This error is rated medium severity. It should be addressed soon, but your appliance may still function in a limited capacity.

Yes — the top-ranked community fix ("Test and Replace Internal Speaker or Amplifier Board") is rated hard difficulty and takes about 90 minutes. Tools needed: T20 Torx screwdriver, Multimeter, Plastic pry tool.

DIY cost: $0-$20. Professional repair typically costs $150-$300. Many homeowners save money by trying the top-ranked community fix first.

The LG TV & Audio OLED65C4PUA 65" Class C4 4K OLED evo Smart TV has 8 other known error codes, including: ABNORMAL TEMP (OLED Panel Over-Temperature), APP CRASH (App Freezes or Crashes), AUDIO SYNC (Audio Out of Sync with Video), BANDING (Horizontal or Vertical Banding), BLINK 2X (Power Supply Overcurrent / Short), and 3 more.

Error code NO AUDIO 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, OLED55B3PUA 55" Class B3 4K OLED Smart TV, OLED65C3PUA 65" Class C3 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.