4-2-6. No video (Component)
Symptom
Audio is normal but no picture is displayed on the screen.
Major
checkpoints
Check the Component 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 component source and check
the connection of component cables(Y,
Pb, Pr)?
No
Input the component source
properly.
Yes
Check the Self Diagnosis (Support →
Self Diagnosis → Picture Test).
Dose the promblem still exist self
diagnosis?
No
Check external devices and
connections.
Yes
1
Does the data appear at R709?
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.
4-16
4. Troubleshooting
4-17
4. Troubleshooting
4-16
4. Troubleshooting
4-17
4. Troubleshooting
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