4-3
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 the SEMT01(MT8226)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
1
2
No
PC cable. Change a PC
cable. Change a main PCB ass’y.
No
Does the digital data appear at the
output of LVDS (RA5104~RA5109)?
Power Indicator is off.
Lamp on, no video.
No
Check a PC source and check
the connection of DSUB cable?
Check a IC5105
Change a main PCB ass’y
Yes
Does the signal appear at C3131,
C3133, C3136(R,G,B)
Please, Contact Tech support.
No
Check a LVDS cable?
Replace a lcd panel?
Yes
Yes
Input a analog PC signal and
connected cable(DPMS).
Yes
1
2
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LE37A65*A
Page 202: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Page 204: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Page 206: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Page 208: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Page 210: ...4 12 4 Troubleshooting WAVEFORMS 2 Digital Output Data 5 Analog Signal Y C ...
Page 237: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 Wiring Diagram ...
Page 238: ...6 2 6 Wiring Diagram ...
Page 239: ...6 3 6 Wiring Diagram 6 2 Wiring Picture ...
Page 242: ...6 6 6 Wiring Diagram Memo ...
Page 246: ...1 4 1 Precautions Memo ...