Samsung UA46D7000L Series Service Manual page 55

No Video (Component)
„
N Refer to the next page to check the location such a CN201 or IC201 SVC Manual mentioned.
Symptom
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-
Major
-
checkpoints
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Caution Make sure to disconnect the power before working on the PD board.
1
2
Diagnostics
Caution Make sure to disconnect the power before working on the IP board.
Genoa-P
Audio is normal but no picture is displayed on the screen.
Check the Component source
Check the Genoa-P
This may happen when the LVDS cable connecting the Main Board and the Panel is
disconnected.
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 signal appear at
R437, R444, R442(Y, Pb, Pr)?
Yes
Does the digital data appear at
pin 14~42 of CN1601?
Yes
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
No
Check a set in the 'Stand-by mode'.
No
Input the component source properly.
No
Change the CN404 or
the main PCB assy.
No
Change the IC1202 or
the main PCB assembly.
No
Please, contact Tech support.
4. Troubleshooting
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