Service manual

4 Troubleshooting
4-4
X400 oscillate properly?
4-3 No Video (DIGITAL 19")
1
Replace or check related circuit.
Check signal cable connection and
power.
Yes
No
Is there R, G, B input at
R100, R101, R102, R103,
R104 and R105?
Check input part.
Yes
No
Is there waveform
at R106, R107?
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 28,
29 and 30 of CN400?
Check the PANEL_EN signal at R222
and BL_EN signal at R603.
No
Yes
Replace LCD Panel.
7
6 6
4 5
* All locations of this page includes Main PBA.