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32LX4DC-UB, 32LX4DCS-UB (CHASSIS:LA53A) - LG TV Service Manual (repair manual). Page 16

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- 16 -
No Sound
Replace Connector
Replace Power Board
Replace A_Board
Replace Speaker
Check Sound supply:
A_board P502 #1, #2 18V
Power board 15Pin 
Connector 
check
Fail
Fail
Fail
Pass
Pass
Pass
Speaker output check :
Is there waveform of P600/P601 #1?
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