Samsung LN32A650A1F - No Video (Tuner_Cvbs)

4-7
4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom Audio is normal but no picture is displayed on the screen.-
Major
checkpoints
Check the Tuner CVBS source
Check the Bayhill+
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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-
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Diagnostics
Check TU701.
Change the main PCB assembly or tuner.
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the RF source and
check the connection of RF cable?
No
Input the RF signal.
Check the connected cable.
Yes
6
Does the signal appear at TU701?
Yes
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the digital data appear at output
of R1308 ~R1321, R1323~R1336?
No
Check IC1001
Change the main PCB assembly
5
Caution Make sure to disconnect the power before working on the IP board.