Acer B223W - Page 36

36
W/LED No Backlight
Check the 14V voltage input from the adapter part
Check the adapter
Check ON/OFF signal
Check Interface board
Check if IC801 pin12 voltage is normal
Change Q805.Q808 or Q810
Check the pin9&10 of IC801 have PWM wave
Change Q801/Q804/Q811/Q812
Re
p
lace IC801
Check the resonant wave
of pin3 & pin7 for T801
Check the output of T801, T802
Check Q802/Q803
Check connecter & lamp
OK
Change T801, T802
OK
OK
OK
OK
OK
NG
NG
NG
NG
NG
NG
OK