Samsung UE40D500 BW Series Service Manual page 49

No video (HDMI 1, 2 - 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 HDMI switch, Check the Main Chipset.
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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
CN601 (Pin#12 , #7 )(HDMI1)
CN604 (Pin#12 , #7 )(HDMI2)
(HDMI RX_Clk , RX_Data) ?
Yes
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK- ,
O_TXCLK+, O_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 CN601,CN602.
No
Check HDMI cable.
Change the Main Assy.
No
Check IC1111 (X5).
Change the Main Assy.
No
Please, Contact Tech support.
4. Troubleshooting
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