HCL HCMELWBT11 Service Manual page 34

18.5" LCD Color Monitor
No backlight
Check C802=12V
OK
Check ON/OFF signal
OK
Check IC801 PIN12=12V
OK
OK
OK
OK
Check the output of T801
OK
Check connecter & lamp, feedback and protect circuit
NG
NG
NG
Check IC801 PIN5 have triangle wave
NG
Check IC801 PIN9/PIN10 PWM wave
NG
Check Q802 Drain wave
NG
NG
Check adapter and F801
Check main board
Change ON/OFF circuit
Change IC801
Check IC801
Check Q801/Q804/Q811/Q812
Change T801
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HCL HCMELWBT11