No Video (Dvi) - Samsung SyncMaster 2032BW Service Manual

4-4. No Video (DVI)

Symptom - The LED power turns on but the screen is blank when the DVI cable is connected.
- Check the DVI cable connections.
Major
- Check whether the LVDS cable is connected correctly to the panel.
checkpoints
- Check whether the lamp connector of the panel is connected correctly to the IP board.
Diagnostics
1
4
5
6
Caution Make sure to disconnect the power before working on the IP board.
Check signal cable connection
and power.
Yes
X1 oscillate properly?
Yes
Is there R, G, B input at
R100,R101,R102,R106
and R108?
Yes
Does the output signal appear
at Pin 17~20, 22~27 of CN400?
Yes
There are DC 5V at Pin 1,
2 and 3 of CN400?
Yes
Replace LCD Panel.
Main Board Front
No
No
No
Check the PANEL_EN signal
No
at R222 and BL_EN signal at
4. Troubleshooting
Replace or check related
circuit.
Check input part.
Check IC400 and related
circuit.
R603.
4-5