Service Manual
31
Power (include IF +5Vand +3.3V) supply and display normal but LED Amber
Is Power LED Amber?
Do the Hsync. & Vsync. Signals exist
in CN102 #13& #14 separately when
select VGA mode by OSD?
Do the Hsync. & Vsync. Signals exist
in R133 & R134?
Do the Hsync. & Vsync. Signals exist
in U105#16& #17?
Is the Q107 work normal?
Is theLED control signal at 61# of
U105 high-low convertible when DC
on/off
END
Insert VGA Cable correctly
Check R133 & R134
Change R133 & R134
Change Q107
NO
NO
YES
YES
Change U105
NO
NO
NO
YES
YES
YES
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