Samsung PS43E490B1WXXH Service Manual page 38

4. Troubleshooting
16 Gra y P a tte rn
Che ck the LED ope ra tion of Logic Boa rd
whitch is norma lly ope ra ting?
Che ck the output of LVDS .
Is it norma lly ope ra ting?
Che ck the e a ch output of the S MP S .
Is it norma lly ope ra ting?
Che ck the e a ch output of the S MP S a fte r
dis conne cting the powe r ca ble from S MPS .
And re pla ce X-Ma in, Y-Main Boa rd,
Y-S ca n Boa rd.
<PC Input–1 (V-sync, H-sync, R/G/B)>
4-8
H-sync
16 Gra y Wa ve Form
No
Re place the Logic Boa rd.
No
Re place the Main Boa rd.
No
Re place the S MP S .
No
Re place the Y-S ca n Boa rd.
<PC Input–2 (V-sync, H-sync, R/G/B)>
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