42LM670S, 42LM670T, 42LM671S, 42LM671T (CHASSIS:LD22E) - LG TV Service Manual (repair manual). Page 104

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Standard Repair Process Detail Technical Manual
LCD TV connection diagram (1)
A. Video error _Vertical/Horizontal bar, 
residual image, light spot 
As the part connecting to the external input, check the 
screen condition by signal
A8
Established 
date 
Revised 
date 
Error 
symptom
Content
LCD  TV
<ALL MODELS>
2010. 12 .14
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