Samsung 730MP - 5-4 No Picture (VIDEO;S-VIDEO;SCART)

5 Troubleshooting
5-4 730MP
8
9
10
WAVEFORMS
5-4 No Picture (VIDEO/S-VIDEO/SCART)
Does a signal appear at
RA787, R788 and R793?
(VCT_ROUT,GOUT,BOUT)
Does a signal appear at
R716(VIDEO), R720,
R721(S-VIDEO),
R711(SCART)?
Check related circuit IC701
and Q704, Q705, Q706.(VCTI)
Yes
Yes
No
Check related connector.
No
Does a signal appear at
Pin No. 99, 98
(VCT_H/V Sync)?
Check related circuit
IC701.(VCTI)
No
Replace LCD Panel.
8
9
10
Yes
Does a signal appear at
RA709~RA714
(ADC output)?
Does a signal appear at
Pin No.1~30 of
CN400(LVDS output)?
Yes
Yes
Check related
IC705.(MST9886)
No
Check IC400.(GM1501H)
No
6
6