HP CQ1569 Service Manual page 33

15.6" LCD Color Monitor
2. W/LED No Backlight
Check ON/OFF signal
Check IC801 pin2=5V ?
Check the pin1 of IC801 have saw tooth wave
Check ZD801 has the output of square wave at short time.
Check Q802 wave
Check the output of T801
Check connecter & lamp
Check Q806 =12V
NG
OK
NG
OK
OK
NG
OK
NG
OK
NG
OK
NG
OK
Check Q806
Check Interface board
NG
Change Q809,Q803
Change IC801
CheckQ803/Q805
Check Q808,Q811
Change T801
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HP CQ1569