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 IC6001(SDP84)
-
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
Diagnostics
No
PC cable. Change a PC
cable. Change a main PCB ass’y.
No
Does the digital data appear at the
output of LVDS (TP7025~TP7038 ,
TP7040~TP7053)?
Power Indicator is off.
Lamp on, no video.
No
Check a PC source and check
the connection of DSUB cable?
Check a IC7001
Change a main PCB ass’y
Yes
Does the signal appear at
R3012,R3011,R3009(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 LA32C650 Series
Page 38: ...1 4 1 Precautions Memo ...
Page 61: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B H_sync input signal of IC6001 SDP84 ...
Page 63: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Page 65: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Page 67: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal at C6852 C6853 C6854 ...