4-5
4. Troubleshooting
4-4. No Video (DVI)
Symptom - The LED power turns on but the screen is blank when the DVI cable is connected.
Major
checkpoints
- Check the DVI cable connections.
- Check whether the LVDS cable is connected correctly to the panel.
- Check whether the lamp connector of the panel is connected correctly to the IP board.
Diagnostics
Yes
1
Check signal cable connection
and power.
Yes
Replace or check related
circuit.
No
X1 oscillate properly?
Is there R, G, B input at
R100,R101,R102,R106
and R108?
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 BL_EN signal at
R603.
No
Yes
Replace LCD Panel.
4
5
6
Caution Make sure to disconnect the power before working on the IP board.
Main Board Front
To Next Page
Loading...
