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 FFCcable connecting the Main Board and X-Main, Buffer Board
Diagnostics
Ye s
Ye s
Ye s
Re pla ce the Ma in Boa rd.
Re pla ce the FFC Ca ble .
Che ck the FFC conne ctor.
Is it conne cte d corre ctly?
Re pla ce the S MP S .
Che ck the e a ch output of S MP S .
Are a ll volta ge ne rma l?
Che ck the LED ope ra tion of Ma in Boa rd
whitch is norma lly ope ra ting?
(Norma l : Blink once a s e cond)
No
No
No
Re pla ce the Ma in Boa rd.
CAUTION
Make sure to disconnect the power before working on the SMPS board.
Copyright© 1995-2013 SAMSUNG. All rights reserved.
4-4
