Samsung PS51D550C1WXZG Service Manual page 26

4. Troubleshooting
CAUTION
Make sure to disconnect the power before working on the SMPS board.
4-5
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)
Ye s
Che ck the LVDS conne ctor.
Is it conne cte d corre ctly?
Ye s
Che ck the e a ch output of the S MP S .
Are a ll volta ge norma l?
Ye s
Re place the Main Boa rd.
No
Re place the Logic Boa rd.
No
Re place the LVDS Ca ble .
No
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Re place the S MP S .