LG 42PT250B Service Manual page 59

12. Component / RGB / AV Audio Trouble Shooting
Check Video Output
Y
Check Jack JK1000/JK1002/P900
Y
Check Signal
C206/C207/C208/C209/C210/C211
C212/C220/C221/C222/C223/C224
C225/C205/R166/R167/R168/R169
R170/R171/R127/C215/C216/C203
C217/C218/C219/C204/R187/R188
C226/C227
Y
Follow procedure All source audio
trouble shooting
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Only for training and service purposes
N
Follow procedure external input
video trouble shooting
N
Replace Jack
Replace one of
C206/C207/C208/C209/C210/C211
N
C212/C220/C221/C222/C223/C224
C225/C205/R166/R167/R168/R169
R170/R171/R127/C215/C216/C203
C217/C218/C219/C204/R187/R188
C226/C227 & Recheck
Maybe Mstar S7LR audio block has
N
problems.
Replace It
LGE Internal Use Only