Samsung UN46C9000ZF Service Manual page 107

4-1-3. No Video (HDMI - Digital Signal)
Symptom
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-
Major
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checkpoints
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4
Diagnostics
5
7
Caution Make sure to disconnect the power before working on the PD board.
Notice Refer to the next page for detailed locations.
Audio is normal but no picture is displayed on the screen.
Check the HDMI source
Check the IC1001(Valencia)
Check if the LVDS cable is loose or not.
No video
Yes
Check the HDMI source and
check the connection of HDMI cable?
Yes
Does the signal appear at
IC501 pin1~6, 99, 100(HDMI1),
pin8~15(HDMI2), pin17~24(HDMI3),
pin26~33(HDMI4)?
Yes
Does the digital data appear at output of
IC501 pin80~87(HDMI output)?
Yes
Does the digital data appear at
Pin 11~81 of CN1602 ?
Yes
Check the LVDS cable?
Check the T-con board?
Replace the LCD panel?
Input an HDMI signal.
No
Check the connected cable.
First of all check the setting of the
external device.
No
And then check the HDMI cable.
If the problem still occurs,
replace the Main Board.
No
Change the IC501 or
the main PCB assembly.
No
Change the IC1001 or
the main PCB assembly.
No
Please, contact Tech support.
4. Troubleshooting
4-15