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4. Troubleshooting
4-2-6. No Video (Video CVBS 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 Video CVBS source
-
Major
Check the Valencia.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
8
7
Diagnostics
5
Caution
Make sure to disconnect the power before working on the IP board.
4-22
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the video source and
check the connection of video cable?
Yes
Check the CVBS signal
at Input of IC901(Arsenal) ?
AV1 R528 : AV1_CVBS
Yes
Check the CVBS clk signal
at output of IC901 (Arsenal)?
R907 : ASN_CVBS_CLK
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 video source properly.
No
Check CN502 or CN501.
Change the Main Assy.
Check IC1101(Valencia) and
No
IC1701(Reading).
Change the Main Assy.
Check IC1101(Valencia) and
No
IC1701(Reading).
Change the Main Assy.
No
Please, Contact Tech support.

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