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4 Troubleshooting
4-2 No Video (ANALOG)
Check signal cable connection and
power.
1
X400 oscillate properly?
Yes
Is there R, G, B input at
R103, R108 and R113?
Yes
Is there Hsync, Vsync waveform
2
3
at Pin 37, 38 of IC 400?
Yes
Is there Hsync, Vsync waveform
3
2
at Pin 43, 44 of IC 200?
Yes
Does the output signal appear
at Pin 8~13, 15,16,18~23,25~30
of CN400?
Yes
There are DC 5V at Pin 1, 2
and 3 of CN400?
Yes
Replace LCD Panel.
4-2
No
Replace or check related circuit.
No
Check input part.
No
Check IC400 and related circuit.
No
Check IC200 and related circuit.
No
Check IC401, IC402 and related
circuit.
No
Check the panel EN signal at R218
and BL_EL signal at R612.
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