Samsung UN46C6900VF Service Manual page 58

4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom
-
-
Major
-
checkpoints
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6
Diagnostics
5
Caution Make sure to disconnect the power before working on the PD board.
Notice Refer to the next page for detailed locations.
4-18
Audio is normal but no picture is displayed on the screen.
Check the Tuner CVBS source
Check the Valencia
Check if the LVDS cable is loose or not.
No video
Yes
Check the RF source and
check the connection of RF cable?
Yes
Does the signal appear at
pin11, 12 of TU801?
Yes
Does the digital data appear at
pin 15~81 of CN1902?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
Input the RF signal.
Check the connected cable.
No
Change the TU801 or
the main PCB assembly.
No
Change the IC1101 or
the main PCB assembly.
No
Please, contact Tech support.