Samsung UN40C8000XM, Service Manual

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4-13
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source
-
Check the IC7001(Valencia)
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Caution Make sure to disconnect the power before working on the PD board.
Diagnostics
Change the HDMI cable.
Change the main PCB assembly.
No
Yes
Does the digital data appear at output of
IC3013_CH pin80~87(HDMI output)?
No
Yes
No video
Yes
Check the HDMI source and
check the connection of HDMI cable?
No
Input an HDMI signal.
Check the connected cable.
Yes
Change the IC3013 or
the main PCB assembly.
Yes
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
Please, contact Tech support.
No
Does the signal appear at
IC3013_CH pin1~6, 99, 100(HDMI1),
pin8~15(HDMI2), pin17~24(HDMI3),
pin26~33(HDMI4)?
Does the digital data appear at
pin 15~81 of CN9301?
No
Change the IC7001 or
the main PCB assembly.
3
4
5