Acer H235H Service Manual page 41

2.) No Backlight
Check if the input voltage of inverter part is 16V
Check connecter & lamp
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OK
NG
Check ON/OFF signal
OK
Check IC801 PIN10=16V
OK
NG
Check IC801 PIN5 have triangle wave
NG
OK
Check IC801 PIN8/PIN9 PWM wave
NG
OK
Check the output of PT801
OK
NG
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Check adapter part
NG
Check Interface board
Check ON/OFF circuit
Change IC801
Check Q805/Q806/IC801
Change PT801
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