Dell E1909Wc - Page 49

19" LCD Color Monitor Dell E1909Wc
49
No Backlight
Check CN902 pin4.=4，5 = 12V
NG
OK
Check adapter or MB
Check ON/OFF signal
Check Interface board
NG
OK
Check IC801 PIN12=14V
NG
OK
Change Q802, Q803
Check IC801 PIN10, 9 have the output of square wave at short time
NG
OK
Change IC801
Check Q803,Q802 PIN5, 6, 7, 8 have the output of square wave at short time.
NG
OK
Check Q802, Q803,Q801, Q804, Q811 ,Q812,
Check the output of T801,T802
Check connecter & lamp
OK
NG
Change T801,T802