LG TV & Audio SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos OPTICAL NO AUDIO Error Fix: Optical Input — No Audio

Error code OPTICAL NO AUDIO on the LG TV & Audio SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos means: Optical Input — No Audio. Soundbar set to Optical input but no sound. Ensure optical (TOSLINK) cable firmly seated (should click in). Check source audio output is set to Optical/S/PDIF. Press Function to cycle to Optical input (display shows "OPT"). Set Digital Sound Output on TV to PCM or Auto. Replace cable if damaged — fiber breaks if bent sharply. Optical does not carry Dolby Atmos or DTS:X.

The most successful fix is "Replace Optical Cable and Test Soundbar Optical Input Board" (medium difficulty, ~30 minutes). Estimated DIY cost: $15-$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 ("Replace Optical Cable and Test Soundbar Optical Input Board") is rated medium difficulty and takes about 30 minutes. Tools needed: T10 Torx screwdriver, Multimeter.

DIY cost: $15-$20. Professional repair typically costs $120-$180. Many homeowners save money by trying the top-ranked community fix first.

The LG TV & Audio SP11RA 7.1.4 Channel 770W Soundbar with Meridian & Dolby Atmos has 8 other known error codes, including: AMP BOARD FAIL (Amplifier Board Failure), ARC BOARD FAIL (HDMI ARC Board Failure), ARC CONNECTION FAIL (HDMI ARC Connection Not Established), AUTO POWER OFF (Soundbar Turns Off Unexpectedly), BLUETOOTH PAIRING FAIL (Bluetooth Pairing Failed), and 3 more.

Error code OPTICAL NO AUDIO also appears on 2 other LG TV & Audio models: S95QR 9.1.5 Channel 810W Soundbar with Meridian & Dolby Atmos, SP7Y 5.1 Channel 440W Soundbar with Meridian & DTS Virtual:X. The fix may vary by model, so check each model's specific page for tailored repair steps.