Daewoo L520B Service Manual page 37

5. No Video
5-1.
No video for PC Source
Black
Is OSD normal?
Is the contrast
at its maximum?
Is the output of
ADC correct?
Next Page.
Is the output
of Scaler correct?
Check If
the CON 5 wafer is
well connected at
the LCD panel.
Yes
No
Yes
No
Yes
No
Yes
Check the video
input signal.
Yes
No
Yes
3. No raster
Set the contrast
up to Max.
Is the input of
ADC correct?
No
Replace the main board
(or replace ADC).
Is the input of
Scaler correct?
Yes
Replace the main board
(or replace ADC).
35
Yes
No