Samsung LA32B650T1R Service Manual page 64

4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom Audio is normal but no picture is displayed on the screen.
-
Check the Tuner CVBS source.
-
Major
Check the Tuner, Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
4
2
Caution Make sure to disconnect the power before working on the IP board.
4-12
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the RF source and
check the connection of RF cable?
Yes
Does the DC B33V_Tuner, B5V_Tuner
appear at #4, #2 Pin of Tuner
Yes
Does the CVBS data appear at
#8 pin of Tuner?
Yes
Does the digital data appear at
R1030F (FRC_M_HSYNC)
Pin #19,20,34,35 (LVDS Data clk)of
LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the RF source properly.
No
Change the Main Assy
No
Change the Main Assy
Check IC601 (Chelsea)
No
Change the Main Assy
No
Please, Contact Tech support
Check a set
Check Tuner