4-1-6. No Video (Video CVBS 1, 2)
Symptom Audio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the Video CVBS source -
Check the Valencia. -
Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned. -
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Yes
Yes
No
Check a set in the ‘Stand-by mode’.
Check the LVDS cable?
Replace the T-con / LCD panel?
No
Please, Contact Tech support.
Input the video source properly.
Check the video source and
check the connection of video cable?
No
Check CN502 or CN501.
Change the Main Assy.
No
Check the CVBS signal at Input of IC901?
AV1 R528 : AV1_CVBS
AV2 L501 : AV2_CVB
8
Yes
Yes
Check IC1101 and IC1701.
Change the Main Assy.
Check IC1101 and IC1701.
No
No
Check the CVBS clk signal at output of IC901?
R908 : ASN_CVBS_CLK
Check the LVDS clk signal at output of
Main board? (TX1~TX4)
TP1916 ~1919
TP1940 ~1942
7
5
Caution Make sure to disconnect the power before working on the IP board.
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