AOC 712SI - Page 34

17” LCD Color Monitor AOC 712Si
34
2.) No Backlight
Check F801=12V
NG
OK
Check adapter and F801
Check ON/OFF signal
Check Interface board or main board
NG
OK
Check IC801 PIN2=5V
NG
OK
Change on/off circuit
Check IC201 PIN13 have triangle wave
NG
OK
Change U201
Check IC201 PIN1/PIN15 PWM wave
NG
OK
Check Q802/Q803
Check Q802/Q803 Drain wave
NG
Check the output of PT801
Check Q802/Q803
Check connecter & lamp
OK
NG
Change PT801
OK