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