W/LED No Backlight
Check the 14V voltage input
OK
NG
Check the adapter
Check ON/OFF signal
OK
NG
Check Interface board
Check IC801 pin12=12V?
NG
OK
Change Q805.Q808 or Q810
Check the pin9&10 of IC801 have PWM wave
NG
OK
Check the resonant wave of pin3 & pin7 for T801
Change Q801/Q804/Q811/Q812
OK
Replace IC801
OK
NG
Check Q802/Q803
Check the output of T801,T802
OK
NG
Change T801,T802
Check connecter & lamp
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