Samsung LE19C45 Series Service Manual page 24

4-1-4. No Video (HDMI - Digital Signal)
Symptom Audio is normal but no picture is displayed on the screen.
-
Check the HDMI source.
-
Major
Check the HDMI switch, Check the Chelsea.
-
checkpoints
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
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
CN1001 (Pin #12(RX_CLK),
#7(RX_DATA)) ?
Yes
Does the digital data appear at
ODD_TXCLK+(D3+),
ODD_TXCLK-(D3-)?
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
No
Check CN1001 and HDMI Cable.
Change the Main Assy.
No
Check IC1102(SETD-10).
Change the main Assy.
No
Please, Contact Tech support
4. Troubleshooting
Check a set
4-7