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4-5
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal) (SX1)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source.
-
Check the IC1102(SX1) , Check the HDMI switch
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
No
No
No
Power Indicator is off.
Lamp on, no video.
Check the connection of HDMI cable?
Check a IC1201 HDMI SWITCH IC.
Change a main PCB ass’y.
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
Yes
Yes
Input a HDMI cable.
Yes
Yes
Yes
Does the signal appear at
CN1202(Pin#12, #7 )(HDMI1),
CN1203_H2(Pin#12, #7)(HDMI2),
CN1204_SH(Pin#12, #7 )(HDMI3),
(HDMI RX_Clk , RX_Data)?
550 MODEL
CN1201_550(HDMI3)
CN1204_SH(HDMI4)
Check HDMI cable.
Check a IC1201 HDMI SWITCH IC.
Change a main PCB ass’y.
Does the digital data appear at output of
output of LVDS Cable?
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LA22C450E1
Page 34: ...1 4 1 Precautions Memo ...
Page 51: ...4 4 4 Troubleshooting WAVEFORMS 12 PC input V sink H sink R G B 3 LVDS output ...
Page 53: ...4 6 4 Troubleshooting WAVEFORMS 1 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 55: ...4 8 4 Troubleshooting WAVEFORMS 1 CVBS OUT Grey Bar 2 LVDS output ...
Page 57: ...4 10 4 Troubleshooting WAVEFORMS 1 LVDS output ...
Page 59: ...4 12 4 Troubleshooting WAVEFORMS 1 I2S Data 2 Speaker out ...
Page 63: ...4 16 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 65: ...4 18 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 67: ...4 20 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 69: ...4 22 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 71: ...4 24 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 73: ...4 26 4 Troubleshooting WAVEFORMS 7 Speaker out ...