AOC L19WA91 Service Manual page 25

3. No Display (LED Indicator Green)
Check back light is OK
OK
Check LVDS cable
and connector
OK
Check U401
OK
Check U400
NG
Check 12V
power supply
OK
Check BL-ON/OFF signal
NG
Replace U401
NG
Replace U400
OK
NG
Check Panel
NG
Check PS
signal
NG
NG
Check Q151
Replace Panel
25
OK
Check power
board
NG
Replace Q151