4. Troubleshooting
■ No Video
Symptom
•
Audio is normal but no picture is displayed on the screen.
Major Checklist
•
The output voltage of the Main SMPS.
•
This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
Diagnostics
Ye s
Ye s
Ye s
Re place the Main Boa rd.
Re place the LVDS Ca ble .
Che ck the LVDS conne ctor.
Is it conne cte d corre ctly?
Re place the S MP S .
Che ck the e a ch output of the S MP S .
Are a ll volta ge ne rma l?
Re place the Logic Boa rd.
Che ck the LED ope ra tion of Logic Boa rd
whitch is norma lly ope ra ting?
(Norma l : Blink once a s e cond)
No
No
No
CAUTION
Make sure to disconnect the power before working on the SMPS board.
4-4
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