Samsung UA46D7000L Series, Service Manual

Page: 46 / 316

4-12
4. Troubleshooting
No Video (Tuner_CVBS)
„
Genoa-P
N
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 Tuner CVBS source
-
Check the Genoa-P
-
This may happen when the LVDS cable connecting the Main Board and the Panel is
-
disconnected.
Caution Make sure to disconnect the power before working on the PD board.
Diagnostics
Input the HDMI signal properly.
Change the IC1001 or
the main PCB assembly.
Please, contact Tech support.
Change the TU701_HN or
the main PCB assembly.
No
No
No
No
Yes
Yes
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check a set in the ‘Stand-by mode’.
No
Yes
Check the HDMI source and check the
connection of HDMI cable ?
Does the digital data appear at
pin 14~42 of CN1601?
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
Does the signal appear at
pin10, 11 of TU701_HN?
2
1
Caution Make sure to disconnect the power before working on the IP board.