LG 23LC1RB-TB Service Manual page 17

No Raster on AV Signal
(Video, S-Video)
Repeat
[A] Process
Pass
Check the signal of
L704, L712, L713, L714
Pass
Check the input/output
of IC100
Pass
Check the input/output
of IC300
Pass
Check input source cable and jack
No Raster on TV(RF) signal
Check the output of
TU1000
Fail
Change
L704, L712, L713, L714
Fail
Re-soldering or
Change the defect part
Fail
Chek X100
Re-soldering or
Change the defect part
Fail
Check X300
- 17 -
Check 5V, 33V of TU1000
Re-soldering or
Fail
Change the defect part