No Video_Component (X4) - Samsung LA22C450E1 Service Manual

4-1-6. No Video_Component (X4)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the Component source
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Major
Check the chelsea.
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checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Yes
Check the component source and check the
connection of component cables (Y,Pb,Pr) ?
Yes
Does the component data appear at
TP - COMP1_Y, COMP1_PB, COMP1_PR
TP - COMP2_Y, COMP2_PB, COMP2_PR
(Comp / Y, Pb, Pr) ?
Yes
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK-,
O_TXCLK+, O_TXCLK- ?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the video source properly.
Check CN1101 / CN1105_SAV
No
Change the Main Assy
Check IC3002 (X4).
No
Change the Main Assy.
No Please, Contact Tech support.
4. Troubleshooting
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