No Video_Hdmi 1, 2, 3, 4 - Digital Signal (B Type) - Samsung UN32C4000PD Service Manual

4-1-4. No video_HDMI 1, 2, 3, 4 - Digital signal (B Type)

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 HDMI switch, 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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3
2
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 HDMI source and
check the connection of HDMI cable ?
Yes
Does the signal appear at
CN1002 (Pin#12 , #7 )(HDMI1)
CN1003 (Pin#12 , #7 )(HDMI2)
CN1004 (Pin#12 , #7 )(HDMI3)
CN1001 (Pin#12 , #7 )(HDMI4)
(HDMI RX_Clk , RX_Data) ?
Yes
Does the digital data appear at
TP - O_TXCLK+, O_TXCLK-,
F_TXCLK+, F_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 HDMI signal properly.
Check CN1001, CN1002.
CN1003, CN1004.
No
Check HDMI cable.
Change the Main Assy.
No
Check IC302 (SX4).
Change the Main Assy.
No
Please, Contact Tech support.
4. Troubleshooting
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