AOC L19WA91 - Repair Flowchart: Display Issues

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3. No Display (LED Indicator Green)
Check 12V
power supply
Check Panel
NG
Replace Panel
Check back light is OK
OK
Check LVDS cable
and connector
OK
Check U401
NG
Replace U401
OK
Check U400
NG
Replace U400
NG
NG
OK
Check BL-ON/OFF signal
Check PS
signal
OK
OK
Check power
board
NG
NG
NG
Check Q151
Replace Q151