Samsung LA32C630 Series Service Manual page 78

4. Troubleshooting
4-1-6. No Video (Video CVBS 1, 2)
Symptom Audio is normal but no picture is displayed on the screen.
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Check the Video CVBS source
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Major
Check the Valencia.
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checkpoints
Refer to the next page to check the lacation such a CN201 or IC201 SVC Manual mentioned.
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8
7
Diagnostics
5
Caution Make sure to disconnect the power before working on the IP board.
4-18
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?
AV1 R528 : AV1_CVBS
AV2 L501 : AV2_CVB
Yes
Check the CVBS clk signal at output of IC901?
R907 : ASN_CVBS_CLK
Yes
Check the LVDS clk signal at output of
Main board? (TX1~TX4)
TP1916 ~1919
TP1940 ~1942
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 and IC1701.
No
Change the Main Assy.
No
Check IC1101 and IC1701.
No
Please, Contact Tech support.