HP W17q - Page 32

17" LCD Color Monitor HP W17q
32
2. W/LED No Backlight
Check C802 (+) =12V
NG
OK
Check Q802
Check ON/OFF signal
Check Interface board
NG
OK
Check IC801 pin2=5V ?
NG
OK
Change Q805 or Q806
Check the pin1 of IC801 have saw tooth wave
NG
OK
Change IC801
Check ZD801 has the output of square wave at short time.
NG
O
CheckQ805/Q806
Check the resonant wave of pin2 & pin5 for T801
NG
Check the output of T801
Check Q801/Q811/D810/D811
Check connecter & lamp
OK
NG
Change T801
OK