LG 15LC1RB-MG Service Manual page 20

No Raster on AV Signal
(Component, CVBS, S-VHS)
Repeat
[A] Process
Pass
Check the signal of
Q113, Q114, Q115
R194, R198, R184
Pass
Check the
input/output of U301
Pass
Check the
input/output of U101
Pass
Check input source cable and jack
No Raster on TV(RF) signal
Check the output of
TU701
Fail
Change Q113, Q114,
Q115, R194, R198, R184
Fail
Re-soldering or
Change the defect part
Fail
Check X301
Re-soldering or
Change the defect part
Fail
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Check 5V, 33V of TU701
Re-soldering or
Fail
Change the defect part