4-30
4. Troubleshooting
No Video (Video CVBS)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Video CVBS source
-
Check the Main Chipset.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Does the CVBS data appear at
PIN - COMP2_Y_CVBS ?
Does the digital data appear at
TP-, E_TXCLK- ,
, O_TXCLK- ?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'.
Input the video source properly.
Please, Contact Tech support.
Check CN502_NEU.
Change the Main Assy.
Check IC1111 (X5).
Change the Main Assy.
No
No
No
No
No
Power indicator LED is off.
Lamp(Backlight) on, no video ?
Check the video source and
check the connection of video cable?
Check the LVDS cable?
Check the T-Con B'd?
Replace the LCD panel?
4
2
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE32D400E1W
Page 20: ...2 14 2 Product specifications 2 4 2 e Manual How to view the e Manual ...
Page 21: ...2 15 2 Product specifications ...
Page 31: ...4 3 4 Troubleshooting Main Board_Bottom ...
Page 33: ...4 5 4 Troubleshooting Main Board_Top ...
Page 34: ...4 6 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 36: ...4 8 4 Troubleshooting Main Board_Top ...
Page 37: ...4 9 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 39: ...4 11 4 Troubleshooting Main Board_Top ...
Page 40: ...4 12 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 42: ...4 14 4 Troubleshooting Main Board_Top ...
Page 43: ...4 15 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 45: ...4 17 4 Troubleshooting Main Board_Bottom ...
Page 46: ...4 18 4 Troubleshooting WAVEFORMS 7 Speaker out ...
Page 48: ...4 20 4 Troubleshooting Main Board_Bottom ...
Page 50: ...4 22 4 Troubleshooting Main Board_Top ...
Page 51: ...4 23 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 53: ...4 25 4 Troubleshooting Main Board_Top ...
Page 54: ...4 26 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 56: ...4 28 4 Troubleshooting Main Board_Top ...
Page 57: ...4 29 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 59: ...4 31 4 Troubleshooting Main Board_Top ...
Page 60: ...4 32 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 62: ...4 34 4 Troubleshooting Main Board_Bottom ...
Page 63: ...4 35 4 Troubleshooting WAVEFORMS 7 Speaker out ...
Page 78: ...4 50 4 Troubleshooting TOP BOTTOM INNER 1 INNER 2 ...
Page 79: ...4 51 4 Troubleshooting Non Filp UE22D5003BW UE19D4003BW PCB ...
Page 80: ...4 52 4 Troubleshooting TOP BOTTOM INNER 1 INNER 2 ...
Page 83: ...4 55 4 Troubleshooting UD5003 40 Model Inch CODE P N UD5003 40 BN44 00473A PSLF121A03S ...
Page 85: ...4 57 4 Troubleshooting SMPS_LD503 32 Model Inch CODE P N LD503 32 BN44 00469B IV40F1_BHS ...