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2.) No Backlight
Check C811(+)=14.5V
Check ON/OFF signal
Check U801 PIN11,14 have the output of square wave at short time
Check Q803 PIN5, 6, 7, 8 have the output of square wave at short time.
Check the output of T801
Check connecter & lamp
NG
OK
NG
OK
NG
OK
NG
OK
NG
OK
Check adapter or MB
Check Interface board
Change U801
Check Q803
Change T801
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