4-4
4. Troubleshooting
4-1-2. No Video (Analog PC signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the PC source
Check MSD237HCG.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check CN5001, PC cable.
Change the Main Assy
BN94-02572B
No
Yes
Does the digital data appear at
CN109 (LVDS Data clk)
of LVDS connector?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the PC source and
check the connection of D-SUB?
No
Input the analog
PC 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
IC4010?
1
2
No
Check a set in the
‘Stand-by mode’ or ‘DPMS mode’.
Caution
Make sure to disconnect the power before working on the IP board.
Содержание LA22B650T6M
Страница 7: ...1 4 1 Precautions Memo ...
Страница 15: ...4 3 4 Troubleshooting ...
Страница 17: ...4 5 4 Troubleshooting ...
Страница 18: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Страница 20: ...4 8 4 Troubleshooting ...
Страница 21: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Страница 23: ...4 11 4 Troubleshooting ...
Страница 24: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 26: ...4 14 4 Troubleshooting ...
Страница 27: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Страница 29: ...4 17 4 Troubleshooting ...
Страница 30: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Страница 32: ...4 20 4 Troubleshooting ...
Страница 33: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Страница 35: ...4 23 4 Troubleshooting ...
Страница 36: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...