Samsung UN40HU6900F, Service Manual

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4-2-5. No Video (Video AV)
Note
Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom Audio is normal but no picture is displayed on the screen. •
Major
checkpoints
Check the Video CVBS source. •
This may happen when the LVDS cable connecting the Main Board and the Panel is •
disconnected.
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video ?
No Check a set in the ‘Stand-by mode’.
Yes
Check the video source and check the
connection of video cable?
No Input the video source properly.
Yes
2
Check the LVDS clk signal at output of
Main board. (TX)
TX6_CLK : TCON SDA
-
TX8_DATA : TCON SCL
-
No
Check IC1400(NT14U).
Change the Main Ass’y.
Yes
Check the LVDS cable?
Replace the T CON / LCD panel?
No Please, Contact tech support.
Caution Make sure to disconnect the power before working on the IP Board.
4-16
4. Troubleshooting