No Video (Digital) - Samsung LS15HAA Service Manual

4-4 No Video (DIGITAL)

Check signal cable connection and
power.
1
X400 oscillate properly?
Is there R, G, B input at
5
4
R110, R112, R114, R111,
R113 and R115?
Is there waveform
7
at R11, R117?
Does the output signal appear
at Pin 17~20, 22~27 of
CN400?
Yes
There are DC 5V at Pin 1, 2
and 3 of CN400?
Replace LCD Panel.
No
Yes
No
6
Yes
No
Yes
No
No
Yes
Replace or check related circuit.
Check input part.
Check input part.
Check IC400 and related circuit.
Check the panel EN signal at R222
and BLEL signal at R603.
4 Troubleshooting
4-5