Dell SP2009W Service Manual - Page 54
No Backlight
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20" LCD Color Monitor No Backlight Check CN902 pin7, 8 = 5V OK NG Check ON/OFF signal OK NG Check IC801 PIN12=13V Dell SP2009Wc Check adapter or MB Check Interface board 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 Check Q802, Q803,D810, D812, Q801 ,Q804,Q811andQ812 OK Check the output of T801,T802 NG OK Check connecter & lamp Change T801,T802 54
20" LCD Color Monitor
Dell SP2009Wc
54
No Backlight
Check CN902 pin7, 8 = 5V
NG
OK
Check adapter or MB
Check ON/OFF signal
Check Interface board
NG
OK
Check IC801 PIN12=13V
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,D810, D812, Q801 ,Q804,Q811andQ812
Check the output of T801,T802
Check connecter & lamp
OK
NG
Change T801,T802