LG 42PM4700 Service Manual page 62

13. HDMI Audio Trouble Shooting
Check video output
Y
Check DDC Line
Y
Check EDID Pull-Up Voltage
Y
Follow procedure All source audio
trouble shooting
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Only for training and service purposes
N
Follow procedure HDMI video
trouble shooting
Replace one
N
R614/R615/R616/R617/R627/R629/
R632/R633/R634/R635
& Recheck
Replace one
N
R604/R606/R618/R620/R619/R621/R
605/R607
& Recheck
N
Maybe MTK5369(IC100) audio
block has problems. Replace it
LGE Internal Use Only