55LM660S, 55LM660T (CHASSIS:LD22E) — LG TV Service Manual (repair manual). Page 116

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Checking method
1. Press the MENU button on the remote controller
2. Select the AUDIO function of the Menu
3. Select TV Speaker from Off to On
Standard Repair Process Detail Technical Manual
Checking method in menu when there is no audio
C. Audio error_No audio/Normal video
<ALL MODELS>
A24
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
2010. 12 .14
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