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 SDP84(ARSENAL)
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
1
No
PC cable. Change a PC
cable. Change a main PCB ass’y.
No
Does the digital data appear at the
output of LVDS (RA7062~RA7067)?
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
Does the signal appear at R3245,
R3246, R3247(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.
2
Summary of Contents for LN52B750U1M
Page 7: ...1 4 1 Precautions Memo ...
Page 31: ...4 4 4 Troubleshooting WAVEFORMS 1 R G B Output Signal PC_R Signal PC_G Signal PC_B Signal ...
Page 33: ...4 6 4 Troubleshooting WAVEFORMS 1 Signal of HDMI Data 2 Digital Output Data ...
Page 37: ...4 10 4 Troubleshooting WAVEFORMS 1 AV_CVBS Output Signal ...
Page 39: ...4 12 4 Troubleshooting WAVEFORMS 1 I2C Data 3 Speaker out ...
Page 66: ...4 39 4 Troubleshooting 5 Press 0 6 Save latest BSP images to update folder in usb memory ...
Page 67: ...4 40 4 Troubleshooting 7 Enter bbm usb after connecting usb memory 8 Press 1 ...
Page 68: ...4 41 4 Troubleshooting 9 Enter u boot bin 10 Press x to return prompt menu ...