4-19
4. Troubleshooting
4-1-8. No Video (Component)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the Component source
Check the chelsea.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Does the component data appear at
TP - 5100, 5024, 5025
(Comp1 / Y, Pb, Pr)?
No
Yes
Power indicator LED is off.
Lamp(Backlight) on, no video?
Yes
Check the component source and
check the connection of
component cables(Y,Pb,Pr)?
No
Input the component
source properly.
Yes
Check CN5003
Change the Main Assy
Yes
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Please, Contact Tech support
No
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
No
Check IC4010 (Saturn4)
Change the Main Assy
2
No
Check a set
in the ‘Stand-by mode’.
5
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE32B53 SERIES
Page 22: ...4 5 4 Troubleshooting PC RGB HV sync LVDS MAINBOARD B ...
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 HDMI3 HDMI2 HDMI1 MAINBOARD T ...
Page 26: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 28: ...4 11 4 Troubleshooting B5V_VCCT_PW B3 3V_PW TUNER_CVBS MAINBOARD T ...
Page 29: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 31: ...4 14 4 Troubleshooting B5V_VCCT_PW B3 3V_PW B1 2V_PW TS DATA MAINBOARD T ...
Page 32: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 34: ...4 17 4 Troubleshooting AV2_CVBS MAINBOARD B ...
Page 35: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 37: ...4 20 4 Troubleshooting Pr Pb Y MAINBOARD B ...
Page 38: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 41: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Page 60: ...4 43 4 Troubleshooting 4 9 PCB diagram 4 9 1 PCB layout FHD 32 37 40 46 MAIN BOARD ...
Page 61: ...4 44 4 Troubleshooting 4 9 2 Main TOP 4 9 3 Main Inner 2 ...
Page 62: ...4 45 4 Troubleshooting 4 9 4 Main Inner 3 4 9 5 Main Bottom ...