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Service Manual
2). W / LED, No Backlight
Check F801 = 14.5V
Check ON/OFF signal
Check U801 PIN12=14.5V
Check U801 PIN10, 9 have the output of square wave at short time
Check Q803, Q812 PIN5, 6, 7, 8 have the output of square wave at short time.
Check the output of PT801
Check connecter & lamp
OK
NG
OK
NG
OK
NG
NG
OK
NG
OK
OK
NG
Check adapter or MB
Check Interface board
Change Q802, Q804
Change U801
Check Q801, Q803, Q805, Q807, Q812, Q813
Change PT801
62
ASUS VH222S&VH222D
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