HP 2009M Service Manual page 36

20" LCD Color Monitor
2. W/LED No Backlight
Check ON/OFF signal
Check IC801 pin12=5V ?
Check IC801 PIN8,9 have the output of square wave at short time
Check the input of Q805, Q806
Check the output of PT801
Check connecter & lamp
Check C803(+)=16V
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
Check C903 and adapter
Check Interface board or main board
Check ON/OFF signal
Change IC801
Change Q805, Q806
Change PT801
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HP 2009M&2009F