4-9
4. Troubleshooting
4-1-5. No Video (Tuner DTV)
Symptom Audio is normal but no picture is displayed on the screen.-
Major
checkpoints
Check the DTV source
Check the Bayhill+
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check TU701
Change the main PCB assembly
or tuner.
Power Indicator is off.
Lamp(Backlight) Off, no video
No
Check the RF source and
check the connection of RF cable?
Yes
Does the digital data appear
at C705 (IF_out + )
C727 (IF_out - )
Yes
Input the RF signal.
Check the connected cable.
Yes
7
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.
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