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19LV2300 (CHASSIS:LA86D) - LG TV Service Manual (repair manual). Page 19

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- 19 -
Check IC1202(1.0V), IC1204(3.3V),
IC1203(3.3V), IC1205(3.3V), IC1206(1.2V)
Are all the outs amplitude normal?
Replace  IC1202 ~ IC1026
which has no power
MT8280FG
YES
YES
Check IC407 Pin # 26
Are the logic signals OK
( Under 0.7V)?
Check Collector port 
of Q419
Are the signal level 3.3V ?
YES
Find which IC doesn
’t have output.
Then, replace the IC you
’ve found.
NO
Replace IC407
NO
Replace IC407
NO
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