No Video (Hdmi - Digital Signal) - Samsung LA37C630 Series Service Manual

4-1-3. No Video (HDMI - Digital Signal)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the HDMI source
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Major
Check the IC3013
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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1
2
Diagnostics
3
Caution Make sure to disconnect the power before working on the IP board.
Power Indicator is off.
Lamp on, no video.
Yes
Check the connection
of HDMI cable?
Yes
Does the digital data appear at
RA3668~RA3671 around IC3013?
Yes
Does the digital data appear at output
of LVDS (TP7025~TP7038 ,
TP7040~TP7053)?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input a HDMI cable.
No
No
Check a IC3013
Change a main PCB ass'y.
No
Check a IC7001
Change a main PCB ass'y.
No
Please, Contact Tech support
4. Troubleshooting
4-5