Samsung UN46C6900VF Service Manual page 67

4-1-7. No Video (Component)
Symptom
-
-
Major
-
checkpoints
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9
Diagnostics
5
Caution Make sure to disconnect the power before working on the PD board.
Notice Refer to the next page for detailed locations.
Audio is normal but no picture is displayed on the screen.
Check the Component source
Check the Valencia
Check if the LVDS cable is loose or not.
No video
Yes
Check component source and
check the connection of
component cable ?
Yes
Does the signal appear at
R501, R502, R503(Y,Pb,Pr)?
Yes
Does the digital data appear at
pin 15~81 of CN1902?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input a component signal.
No
Check the connected cable.
No Change the CN407 or
the main PCB assy.
No
Change the IC1101 or
the main PCB assembly.
No
Please, contact Tech support.
4. Troubleshooting
4-27