4-7
4. Troubleshooting
4-1-3. 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 MSD237HCG.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check CN6009
Check HDMI cable
Change the Main Assy
BN94-02990A
No
Yes
Does the digital data appear at
CN109 (LVDS Data clk)
of LVDS connector?
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
Check IC4010 (Saturn4)
Change the Main Assy
BN94-02990A
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the signal appear at
CN6009 (Pin#12 , #7 )(HDMI1)
(HDMI RX_Clk , RX_Data)?
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 LA22B650T6M
Page 7: ...1 4 1 Precautions Memo ...
Page 15: ...4 3 4 Troubleshooting ...
Page 17: ...4 5 4 Troubleshooting ...
Page 18: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 20: ...4 8 4 Troubleshooting ...
Page 21: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 23: ...4 11 4 Troubleshooting ...
Page 24: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 26: ...4 14 4 Troubleshooting ...
Page 27: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 29: ...4 17 4 Troubleshooting ...
Page 30: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 32: ...4 20 4 Troubleshooting ...
Page 33: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 35: ...4 23 4 Troubleshooting ...
Page 36: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...