HP L1506 - Page 37

15" LCD Color Monitor HP L1506
37
2. W/LED No Backlight
Check C845 (+) =12V
Check R839
Check D808/Q809
Check ON/OFF signal
Check Interface board
Check IC801 pin5=12V voltage
Check Q806/Q807/Q812
Check the pin19/20 of IC801 if have waveforms
Short Q808/Q809 S D ,if the picture normal
Change IC801
Connect PIN4 to PIN7of IC801 and check Q808/Q809 collector waveforms
Check feedback circuit
Change Q808/Q809/PT801
Check connecter & lamp
OK
OK
OK
OK
NG
NG
NG
NG
NG
OK
NG
NG