Samsung LE32A55 P Series, Service Manual

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4-9
4. Troubleshooting
4-1-5. No Picture (Video_CVBS)
Symptom Audio is normal but no picture is displayed on the screen.
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Major
checkpoints
Check the Video Source
Check the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
2
1
No
Check a connection harness.
No
Power Indicator is off.
Lamp on, no picture.
Yes
Does the signal appear at C5106 of
IC5105?
No
Please, Contact Tech support.
Check a LVDS cable?
Replace lcd panel?
Yes
Check a A/V cable and video signal.
Yes
1
2
Does the digital data appear at the
output of LVDS (RA5104~RA5109)?
No
Check a IC5105
Change a main PCB ass’y
Caution Make sure to disconnect the power before working on the IP board.