LG LGXBR342 Service Manual page 53

No COMPOSIT / S-VIDEO signal when playing DISC
COMPOSIT : No Signal
YES
R606, C610
YES
IC610 – 4
Check input
YES
C650
YES
R458
YES
IC4003-8 : HIGH
/RST_VIDEO
YES
IC4003 14,15
Check I2C Clk, Data
YES
IC4003 17,18,19 20, 29, 36
Check signal input
YES
IC4003 21~24 61~64 Check
VO_D0~VO_D7 signal
YES
RR123~RR126
Check VO_D0 ~VO_D15
S-VIDEO : No Y Signal
NO
R602, C602
NO
IC610 – 6
Check input
NO
C651
NO
R456
NO
IC2078 – 6
Check Signal
NO
R279 ~ R281
Signal and 3.3V level
NO
Check R112 CLOCK
Check IC4002 power
And Other circuits
3-63
YES
NO
YES
NO
YES
YES
YES
YES
S-VIDEO : No C Signal
YES
R601, C601
YES
IC610 – 2
Check input
YES
C639
YES
R457
YES