No Video - Samsung PA43H4100AR Service Manual

4. Troubleshooting

4.2.2. No Video

• Audio is normal but no picture is displayed on the screen.
The output voltage of the Main SMPS.
•
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
•
Check the LED operation of Logic Board which is
normally operating? (Normal : Blink once a second)
Check the FFC Cable is it connected correctly?
Check All output voltages on SMPS. Are
all voltages normal?
Replace the Main Board.
4-5
Symptom
Major checkpoints
Diagnostics
Check/Replace the X/Y Main or Logic Board.
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Check/Replace the FFC Cable.
Replace the SMPS.