LG 42PM4700 Service Manual page 60

12. Component / RGB / AV Audio Trouble Shooting
Check Video Output
Y
Check Jack JK501/JK504
Y
Check Signal
C537/C538/C539/540/C541/C542
Y
Follow procedure All source audio
trouble shooting
Copyright © 2012 LG Electronics Inc. All rights reserved.
Only for training and service purposes
N
Follow procedure external input
video trouble shooting
N
Check equipment / Replace Jack
N
Replace one of
C537/C538/C539/540/C541/C542 &
Recheck
N
Maybe MTK5369(IC100) audio
block has problems. Replace It
LGE Internal Use Only