Samsung T19C301 Series - No Video (Video CVBS)

4-2-5. No video (Video CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
Major
checkpoints
Check the Video CVBS source•
Check the Chelsea.•
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 RF source and
check the connection of RF cable.
No
Input the video source properly.
Yes
Check the Self Diagnosis (Support →
Self Diagnosis → Picture Test).
No
Check external devices and
connections.
Yes
1
Does the CVBS data appear at R701,
R703.
No
Check CN401_COMP.
Change the Main Assy
Yes
2
Does the digital data appear at TP-E_
TXCLK+, E_TXCLK- , O_TXCLK+,
O_TXCLK-.
No
Check IC901 (NT13).
Change the Main Assy
Yes
Check the LVDS cable?
Check the T-Con Board?
Replace the LCD panel?
Yes
Please, Contact tech support.
Caution Make sure to disconnect the power before working on the Main board.
4-12
4. Troubleshooting
4-13
4. Troubleshooting
4-12
4. Troubleshooting
4-13
4. Troubleshooting