Samsung LA32B650T1R Service Manual page 66

4. Troubleshooting
4-1-5. No Video (Video CVBS 1, 2)
Symptom Audio is normal but no picture is displayed on the screen.
-
Check the Video CVBS source
-
Major
Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
4
2
Caution Make sure to disconnect the power before working on the IP board.
4-14
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the video source and
check the connection of video cable?
Yes
Does the CVBS data appear at
C443(AV1), C441(AV2)?
Yes
Does the digital data appear at
R1030F (FRC_M_HSYNC)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the video source properly.
Check CN1302 or CN1203
No
Change the Main Assy
Check IC601 (Chelsea)
No
Change the Main Assy
No
Please, Contact Tech support
Check a set