Acer B223W - Bdmr - 22" LCD Monitor Service Manual - Page 36
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W/LED No Backlight
Check the 14V voltage input from the adapter part
OK
Check ON/OFF signal
Check if IC801 pin12 voltage is normal
OK
Check the pin9&10 of IC801 have PWM wave
OK
Check the resonant wave
of pin3 & pin7 for T801
Check the output of T801, T802
Check connecter & lamp
OK
NG
NG
OK
NG
OK
NG
Check the adapter
NG
Check Interface board
NG
Change Q805.Q808 or Q810
Change Q801/Q804/Q811/Q812
OK
Replace IC801
Check Q802/Q803
Change T801, T802
36