No Video (Analog) - Samsung 2032BW Service Manual

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4-3. No Video (Analog)

Symptom
-Though the LED power turns on, the screen is blank when connecting the VGA cable.
- Check the D-sub 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
Is there Hsync, Vsync waveform at Pin
3
2
Caution
Make sure to disconnect the power before working on the IP board.
All manuals and user guides at all-guides.com
Check signal cable connection
and power.
Yes
X1 oscillate proprely?
Yes
Is there R,G,B input at
R111,R114 and R118?
Yes
32,33 of IC200?
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
Replace or check related
No
Check IC200 and related
No
No
Check CN400 and related
Check PANEL_EN SIGNAL
No
at R223 is High(On:High) and
BL_EN signal at R601(ON:
4. Troubleshooting
circuit.
Check input part.
circuit.
circuit.
Low) is Low
4-3

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