4 Troubleshooting
4-4
X1 oscillate properly?
4-3 No Video (DIGITAL)
1
Replace or check related circuit.
Check signal cable connection and
power.
Yes
No
Is there R, G, B input at
R100,R101,R102,R106
and R108?
Check input part.
Yes
No
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 BL_EN signal at R603.
No
Yes
Replace LCD Panel.
6
5
4
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