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4-7
4. Troubleshooting
4-1-4. No Video (HDMI - Digital Signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source.
-
Check the HDMI switch, Check the Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Check CN1001 and HDMI Cable.
Change the Main Assy.
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video?
Yes
Check the HDMI source and check
the connection of HDMI cable?
No
Input the HDMI signal properly
Yes
Yes
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Please, Contact Tech support
No
Does the signal appear at
CN1001 (Pin #12(RX_CLK),
#7(RX_DATA)) ?
Does the digital data appear at
OD(D3+),
ODD_TXCLK-(D3-)?
No
Check IC1102(SETD-10).
Change the main Assy.
3
2
No
Check a set
in the ‘Stand-by mode’.
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE19C45 Series
Page 7: ...1 4 1 Precautions Memo ...
Page 22: ...4 5 4 Troubleshooting ...
Page 23: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 25: ...4 8 4 Troubleshooting ...
Page 26: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 28: ...4 11 4 Troubleshooting ...
Page 29: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 31: ...4 14 4 Troubleshooting ...
Page 32: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 34: ...4 17 4 Troubleshooting ...
Page 35: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 37: ...4 20 4 Troubleshooting ...
Page 38: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 40: ...4 23 4 Troubleshooting ...
Page 41: ...4 24 4 Troubleshooting WAVEFORMS 6 I2S DATA 7 Speaker out ...
Page 56: ...4 39 4 Troubleshooting 4 9 PCB diagram ...
Page 57: ...4 40 4 Troubleshooting ...