No Video (Hdmi - Digital Signal) - Samsung LN32A450C1D Service Manual

4-1-3. No Video (HDMI - Digital Signal)

Symptom Audio is normal but no picture is displayed on the screen.
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Check the HDMI source
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Major
Check the MSD2248AL
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
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Diagnostics
4
5
7
Caution Make sure to disconnect the power before working on the IP board.
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the HDMI source and check
the connection of HDMI cable?
Yes
Does the signal appear at
R7049, R7050(CLK+/-),
R7051~R7056(DATA)??
Yes
Does the digital data appear
at output of R7049, R7050(CLK-/+),
R7051~R7056(DATA)?
Yes
Does the digital data appear at
output of R3082F~R3095F?
Yes
Check the LVDS cable?
Replace the LCD panel?
Input an HDMI signal.
No
Check the connected cable.
Check JA7001, JA7002, JA801S(SIDE),
No
Change the HDMI cable. Change
the main PCB assembly
No
Check IC3001
Change the main PCB assembly
No
Check IC4001
Change the main PCB assembly
No
Please, Contact Tech support
4. Troubleshooting
HDMI cable.
4-5