Dell E1909W Service Manual page 33

Service Manual
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#32& #33?
Is the Q108 work normal
Is theLED control signal at 4# of
U105 high-low convertible when DC
on/off
YES
YES
YES
YES
YES
END
32
NO
Insert VGA Cable correctly
NO
Check R133 & R134
NO
Change R135 & R136
NO
Change Q108
Change U105
NO