Service manual

36
5. No Video
5-2.
No video for AV Source
Is OSD normal?
Black
No
No
Yes
Yes
Is the contrast
at its maximum?
3. No raster
Set the contrast
up to Max.
Next Page.
Yes
No
Yes
Is the output of
Decoder(U5)
correct?
No
Yes
Is the input of
Decoder(U5)
correct?
Check the video
input signal (or
check the CON 4).
Replace the main board
(or replace Decoder(U5)).
Yes
Check If
the CON 7 wafer is
well connected at
the LCD panel.
No
Yes
Is the output
of Scaler correct?
No
Yes
Is the input of
Scaler correct?
Replace the main board
(or replace Decoder).
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