LG 55LA86 Series Service Manual page 124

Standard Repair Process Detail Technical Manual
Error
Established
C. Audio error_No audio/Normal video
2012. 12 .06
symptom
date
LCD TV
Revised
Content Checking method in menu when there is no audio A24
date
<ALL MODELS>
Checking method
1. Press the MENU button on the remote controller
2. Select the SOUND function of the Menu
3. Change TV Sound Out to TV Speaker