4-5
4. Troubleshooting
4-1-3. 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
Power indicator LED is off.
Lamp(Backlight) on, no video?
Check the PC source and
check the connection of D-SUB ?
Does the signal appear at
TP - PC_R, PC_G, PC_B, PC_HS, PC_VS
(R, G, B, H, V) ?
Does the digital data appear at
TP-, E_TXCLK-,
, O_TXCLK-?
Check the LVDS cable?
Check the T-Con B’d?
Replace the LCD panel?
Check a set in the ‘Stand-by mode’
or ‘DPMS mode’.
Input the analog PC signal properly.
Check CN902, PC cable.
Change the Main Assy.
Check IC1102 (SX1).
Change the Main Assy.
Please, Contact Tech support.
Yes
Yes
Yes
Yes
No
No
No
No
No
1
2
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LA32C530F1R
Page 49: ...4 4 4 Troubleshooting MAINBOARD T T CON ...
Page 51: ...4 6 4 Troubleshooting MAINBOARD B ...
Page 52: ...4 7 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 54: ...4 9 4 Troubleshooting MAINBOARD T ...
Page 55: ...4 10 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 57: ...4 12 4 Troubleshooting MAINBOARD T ...
Page 58: ...4 13 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 60: ...4 15 4 Troubleshooting MAINBOARD T ...
Page 61: ...4 16 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 63: ...4 18 4 Troubleshooting MAINBOARD B ...
Page 64: ...4 19 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 66: ...4 21 4 Troubleshooting MAINBOARD B ...
Page 67: ...4 22 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 69: ...4 24 4 Troubleshooting MAINBOARD B MAINBOARD T ...
Page 70: ...4 25 4 Troubleshooting WAVEFORMS 6 Speaker out ...
Page 89: ...4 44 4 Troubleshooting 4 9 PCB diagram 4 9 1 PCB layout 4 9 2 Main TOP ...
Page 90: ...4 45 4 Troubleshooting 4 9 3 Main Inner 2 4 9 4 Main Inner 3 ...
Page 91: ...4 46 4 Troubleshooting 4 9 5 Main Bottom ...
Page 92: ...4 47 4 Troubleshooting 4 9 6 Power_32 SMPS 4 9 7 Power_37 SMPS ...
Page 93: ...4 48 4 Troubleshooting 4 9 8 Power_40 SMPS 4 9 9 Power_46 SMPS ...