Asus MW201U Service Manual page 40

20" LCD Color Monitor
2.) W / LED, No Backlight
Check CN903 pin6 = 12V
Check IC801 pin5=12V
Check IC801 PIN18, 17 have the output of square wave at short
Check D801, D802, D804, D806, D811, D813 and D814
Check the input wave of pin2 & pin6 for PT801, PT802
Check the output of PT801, PT802
Check connecter & lamp
OK
Check ON/OFF signal
OK
OK
OK
have the output of square wave at short time.
OK
OK
OK
NG
Check adapter or MB
NG
Check Interface board
NG
Change Q802 or Q803
NG
Change IC801
NG
Check Q801, Q804, Q811, Q812
NG
Check C806, C807, C809, C831, C833, C838
NG
Change PT801, PT802
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ASUS MW201U