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 M-star
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 (R6048~6045_FBE)?
Power Indicator is off.
Lamp on, no video.
No
Check a PC source and check
the connection of DSUB cable?
Check a IC6001.
Change a main PCB ass’y
Yes
Check a LVDS cable?
Replace a lcd panel?
Does the signal appear at C5050,
C5049, C5047(R,G,B) of IC5001
Please, Call to Samsung Co. LTD.
Yes
Yes
Input a analog PC signal and
connected cable(DPMS).
Yes
1
Yes
2
3
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LA40A350C1X
Page 10: ...3 6 3 Disassembly and Reassemble Memo ...
Page 42: ...1 4 1 Precautions Memo ...
Page 48: ...2 6 2 Product specifications Memo ...
Page 49: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 Coral Block Diagram ...
Page 50: ...7 2 7 Schematic Diagram 7 2 Schematic Diagrams 7 2 1 MAIN POWER BLOCK ...
Page 51: ...7 3 7 Schematic Diagram 7 2 2 SOUND AMP Schematic Diagram 7 2 3 HDMI Input Schematic Diagram ...
Page 54: ...7 6 7 Schematic Diagram 7 2 8 FBE2 Schematic Diagram ...
Page 58: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal ...
Page 60: ...4 6 4 Troubleshooting WAVEFORMS 2 Digital Output Data 3 Signal of HDMI Data ...
Page 62: ...4 8 4 Troubleshooting WAVEFORMS 3 CVBS Output Signal 4 Tuner_CVBS Output Signal ...
Page 64: ...4 10 4 Troubleshooting WAVEFORMS 4 CVBS Output Signal ...
Page 66: ...4 12 4 Troubleshooting WAVEFORMS 2 Digital Output Data 5 Analog Signal Y C ...
Page 77: ...4 23 4 Troubleshooting 4 6 2 Software Upgrade Flash Downloader Flash Downloader ...