LG FLATRON E2040S - TROUBLESHOOTING: POWER SUPPLY FAILURES; AC INPUT AND ADAPTER CHECKS; INTERNAL POWER BOARD AND PANEL ISSUES

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Only for training and service purposes
5. POWER
Replace panel
Check Vout about
35V?
Check L801,D801,Q801
NO
YES
Check
CN701=12V?
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Check FB701,C716
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YES
NO
YES
No Power
(Power Indicator Off)
Check AC line
volt
Check the
adapter
Check AC line & AC
soc
k
et
Replace adapter
NO
YES
NO
Check main board
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Checkmainboard
NO