No Video (Analog Pc Signal) - Samsung LA32A330J1N Series Service Manual

4-1-2. No Video (Analog PC signal)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the PC source
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Major
Check the SEMS01 (IC5001)
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checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
1
2
Caution Make sure to disconnect the power before working on the SMPS/IP.
Power Indicator is off.
Lamp on, no video.
Yes
Check a PC source and check
the connection of DSUB cable?
Yes
Does the signal appear at
R3101,R3102,R3103 (R, G, B)?
Yes
Does the digital data appear at the
output of LVDS (RA5009~5011)?
Yes
Does the digital data appear at the
output of LVDS Data(IC5 #81~96)?
Yes
Check a LVDS Cable Connection?
Replace a lcd panel?
Input a analog PC signal and
No
connected cable(DPMS).
No
PC cable. Change a PC cable.
No
Check a IC5001.
Change a main PCB ass'y
No
Change a main PCB ass'y
No
Please, Call to Samsung Co. LTD.
4. Troubleshooting
Check a IC5.
4-3