AOC HP L1906 Service Manual page 37

19" LCD Color Monitor
2. W/LED No Backlight
Check IC801 pin5=12V voltage PIN3>3V
Preset at 2V to PIN4 of IC801 and Connect PIN1 to GND
Check the pin15 of IC801 have saw tooth wave
Open D809, Check IC801 PIN2<2V
OK
OK
Check Q808、Q809
OK
OK
Check IC801 PIN9≠0V
OK
Check open protection circuit
Check connecter & lamp
NG
Change Q806 or Q807 or Q812
NG
Change IC801
NG
Change Q808、Q809
NG
Check OVP loop circuit
NG
Check D801 FB loop circuit
37
HP L1906