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Asus MW221 Service Manual page 37

22" lcd color monitor
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22" LCD Color Monitor
2.) W / LED, No Backlight
Check CN903 pin2 = 12V
Check IC801 pin5=12V
Check IC801 PIN18, 17 have the output of square wave at short
Check D820, D821, D826 and D827 have the output of
Check the input wave of pin2 & pin5 for T801, T803, T804 and T805
Check connecter & lamp
OK
Check ON/OFF signal
OK
OK
OK
square wave at short time.
OK
OK
Check the output of T801, T803, T804 and T805
OK
NG
Check adapter or MB
NG
Check Interface board
NG
Change Q801 or Q802
NG
Check C826, R820 and IC801
NG
Check Q803, Q806
NG
Check C807, C817, C836, C840
NG
Check T801, T803, T804 and T805
37
ASUS MW221

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