21.5" LCD Color Monitor AOC 2236Vwa
34
2.) No Backlight
Check C811(+)=14.5V
Check R807/R805/C802/R803/R801/RJ801
R808/R806/C804/R804/R802/RJ802
NG
OK
Check adapter and Q803
Check ON/OFF signal
Check Interface board or main board
NG
OK
Check U801 PIN9=14.5V
NG
OK
Change on/off circuit
Check U801 PIN8 have triangle wave
NG
OK
Change U801
Check T801 have the output of square wave at short time
NG
OK
Check C812,C813
Check resonant wave of pin7 & pin8 for T801
NG
Check the output of T801
Check connecter & lamp, feedback and protect circuit
OK
NG
Change T801
OK
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