HP LP2275w

22" LCD Color Monitor HP LP2275w
47
2. W/LED No Backlight
Check F801 =12V
NG
OK
Check C801 C802(+)
Check ON/OFF signal
Check Interface board
NG
OK
Check IC801 pin2=5V ?
NG
OK
Change Q801 or Q802
Check the pin12 of IC801 have saw tooth wave
NG
OK
Change IC801
Check PIN1 PIN15 of IC801 has the output of square wave at short time.
NG
OK
CheckQ802/Q804 Q808/Q809
Check Q802/Q804 Q808/Q809 PIN5, 6, 7, 8 have the output of square wave at
NG
Check the output of T801,T803
Check the output of T801,T803
OK
Check Q802/Q804 Q808/Q809
Check connecter & lamp
OK
NG