4-8
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 Arsenal, Check the Chelsea.
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
No
Check CN1204, PC cable.
Change the Main Assy
No
Does the digital data appear at
R1030F (FRC_M_HSYNC)
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Power indicator LED is off.
Lamp(Backlight) on, no video?
No
Check the PC source and
check the connection of D-SUB?
Does the signal appear at
C464, C465, C466, R1250, BD1205
(R, G, B, H, V) of IC501?
No
No
Please, Contact Tech support.
Check the LVDS cable?
Replace the LCD panel?
Check IC601
Change the Main Assy
Yes
Yes
Yes
Input the analog
PC signal properly.
Yes
1
2
Check a set in the
‘Stand-by mode’ or ‘DPMS mode’.
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LA32B650T1R
Page 28: ...1 4 1 Precautions Memo ...
Page 61: ...4 9 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 63: ...4 11 4 Troubleshooting WAVEFORMS 3 PC input V sink H sink R G B 2 LVDS output ...
Page 65: ...4 13 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 67: ...4 15 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 69: ...4 17 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 71: ...4 19 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Page 85: ...4 33 4 Troubleshooting 5 Press 0 6 Save latest BSP images to update folder in usb memory ...
Page 86: ...4 34 4 Troubleshooting 7 Enter bbm usb after connecting usb memory 8 Press 1 ...
Page 87: ...4 35 4 Troubleshooting 9 Enter u boot bin 10 Press x to return prompt menu ...