LG RZ-30LZ50 Service Manual page 19

No Raster on AV Signa
(Video1,Video2, S-Video)
Repeat
[A] Process
Pass
Check the signal of
C316,C317,Q308,Q313
Pass
Check the input/output
of IC1
Pass
Check the input/output
of IC500, IC600
Pass
Check the input/output
of IC901
Pass
Check input source cable and jack
No Raster on TV(RF) signal
Check the output of
TU1000
Faill
Change C316,C317,
Q308,Q313
Faill
Re-soldering or
Change the defect part
Faill
Re-soldering or
Change the defect part
Faill
Re-soldering or
Change the defect part
Faill
Check 5V, 33V of TU1000
Re-soldering or
Faill
Change the defect part