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4-2-7. No Video (Component 1, 2)
※ Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.
Symptom
Audio is normal but no picture is displayed on the screen.
-
Check the Component source
-
Major
Check the Valencia.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
9
5
Diagnostics
Caution
Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the component source and check the
connection of component cables(Y,Pb,Pr) ?
Yes
Does the component data appear at ?
Comp1 Y : C1039
Pb : C1040
Pr : C1041
Yes
Check the LVDS clk signal
at output of Main board.(TX1~TX4)
TX1_CLK : TP1978 ~1979
TX2_CLK : TP1980 ~1981
TX3_CLK : TP19102 ~19103
TX4_CLK : TP19104 ~19105
Yes
Check the LVDS cable?
Replace the T-con / LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the component source properly.
No
Check CN502.
Change the Main Assy.
Check IC1101(Valencia) and
No
IC1701(Reading).
Change the Main Assy.
No
Please, Contact Tech support.
4. Troubleshooting
4-25

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