Samsung G5K32ASA Service Manual page 56

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4. Troubleshooting
4-1-4. No Video (Tuner_CVBS)
Symptom
Major
checkpoints
Diagnostics
Caution
4-10
Audio is normal but no picture is displayed on the screen.
-
Check the Tuner CVBS source.
-
Check the Tuner, Check the SEMS03.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
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, B5V_VCCT
appear at #4, #2 Pin of Tuner
Yes
Does the CVBS data appear at
4
#8 pin of Tuner?
Yes
Does the digital data appear at
TP8007(FBE_HSYNC_IN)
2
Pin #19,20,34,35 (LVDS Data clk)of
LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
Make sure to disconnect the power before working on the IP board.
Published in Heiloo, Holland.
No Check a set
in the 'Stand-by mode'.
No
Input the RF source properly.
No
Change the Main Assy
BN94-02709A
Check Tuner
No
Change the Main Assy
BN94-02709A
Check IC6003 (SEMS03)
No
Change the Main Assy
BN94-02709A
No
Please, Contact Tech support
11/8/15