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20LCD-H5, 20L-510LT (CHASSIS:LJ71A) - LG TV Service Manual (repair manual). Page 17

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- 17 -
4. No Raster on Component Signal
Repeat [A, B]
process.
Pass
Check the input/
output of R806.
Fail
Check the J801.
Pass
Re-soldering or change the
defect part, Check the X100.
Check
the input/output
of R121.
Pass
Check the
input/output of IC100.
Pass
Check input source cable and jack.
Fail
Fail
Re-soldering or Change the defect part.
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