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37LH50YD (CHASSIS:LB91B) - LG TV Service Manual (repair manual). Page 56

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MAIN B’D
L1101 Signal (SIF)
Replace MAIN B’D IC1102
NO
Analog TV Video OK ?
YES
Check MAIN B’D
R2046 Signal (SIF)
NO
Replace MAIN B’D IC100
YES
Making 
Revision 
2009. 2 . 1
15/25
LCD TV
Symptom
Analog TV No Audio Problem
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