4-4
4. Troubleshooting
4-1-3. No Video (Analog PC signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the PC source
-
Check the Arsenal, Check the Chelsea.
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
Power indicator LED is off.
Lamp(Backlight) on, no video?
Check the PC source and
check the connection of D-SUB ?
Does the signal appear at
TP - PC_R, PC_G, PC_B, PC_HS, PC_VS
(R, G, B, H, V) ?
Does the digital data appear at
TP-, E_TXCLK-,
, O_TXCLK-?
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Check a set in the ‘Stand-by mode’
or ‘DPMS mode’.
Input the analog PC signal properly.
Check CN902, PC cable.
Change the Main Assy.
Check IC1102 (SX1).
Change the Main Assy.
Please, Contact Tech support.
Yes
Yes
Yes
Yes
No
No
No
No
1
2
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE26C45 Series
Page 28: ...4 3 4 Troubleshooting ...
Page 30: ...4 5 4 Troubleshooting ...
Page 31: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 33: ...4 8 4 Troubleshooting ...
Page 34: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 36: ...4 11 4 Troubleshooting ...
Page 37: ...4 12 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 39: ...4 14 4 Troubleshooting ...
Page 40: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 42: ...4 17 4 Troubleshooting ...
Page 43: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 45: ...4 20 4 Troubleshooting ...
Page 46: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 48: ...4 23 4 Troubleshooting ...
Page 49: ...4 24 4 Troubleshooting WAVEFORMS 6 Speaker out ...
Page 66: ...4 41 4 Troubleshooting 4 9 3 Main Inner 2 4 9 4 Main Inner 3 ...
Page 67: ...4 42 4 Troubleshooting 4 9 5 Main Bottom ...
Page 68: ...4 43 4 Troubleshooting 4 9 6 Power_32 SMPS LC5XX 4 9 7 Power_37 SMPS LC5XX ...
Page 69: ...4 44 4 Troubleshooting 4 9 8 Power_40 SMPS LC5XX 4 9 9 Power_46 SMPS LC5XX ...
Page 70: ...4 45 4 Troubleshooting 4 9 10 Power_26 SMPS LC45X 4 9 11 Power_32 SMPS LC45X ...