LG 32LG2100 Service Manual page 58

LCD TV
Symptom
Check The Speaker
NO
YES
Check Speaker Cable
NO
YES
CHECK MAIN B'D
JK700 or JK701
NO
YES
MAIN B'D
L700 = 1.8V
NO
YES
MAIN B'D
Check R720, R721, R722
Signal
NO
YES
MAIN B'D
L705 Pin #1
L704 Pin #2
NO
PWM Signal ?
YES
Replace MAIN B'D IC 701
All Source no Audio Problem
Replace Speaker
Replace Speaker Cable
Replace MAIN B'D
_ If headphone is connected, Speaker sound
JK700 or JK701
Replace MAIN B'D IC803
Replace MAIN B'D IC100
Check P700 Cable
NO
Making
Revision
Replace MAIN B'D IC701
2009. 2 . 1
18/34
26~42LH2000
32~47LH3000/LH4000
doesn't work.