Samsung LE26B450C4H Service Manual page 66

4-1-4. No Video (HDMI 1, 2, 3 - 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 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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Diagnostics
3
2
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
CN6009 (Pin#12 , #7 )(HDMI1)
CN6004 (Pin#12 , #7 )(HDMI2)
(HDMI RX_Clk , RX_Data)?
Yes
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Yes
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
No
in the 'Stand-by mode'.
No
Input the HDMI signal properly
Check CN6009, CN6004
No
Check HDMI cable
Change the Main Assy
Check IC4010 (Saturn4)
No
Change the Main Assy
No
Please, Contact Tech support
4. Troubleshooting
Check a set
4-7