4-7
4. Troubleshooting
4-1-3. No video (HDMI - Digital signal)
Symptom
No video with HDMI input.
-
Major
checkpoints
Check your source on the TV.
Check your source content.
Check all connections.
-
-
-
Diagnostics
40”
52”
No
Check CN802, CN901, CN902
Check HDMI cable
Change the Main PCB
40” : BN94-02945D
52” : BN94-02945E
No
Does the digital data appear at
Pin #19,20,34,35 (LVDS Data clk)
of LVDS connector?
Power indicator LED is off.
Lamp(Backlight) on, no video
No
Check the HDMI source and
check the connection of HDMI cable
Does the signal appear at
CN803 (Pin#12 , #7 )(HDMI1)
CN801 (Pin#12 , #7 )(HDMI2)
(HDMI RX_Clk , RX_Data)?
No
No
Please, Contact Tech support
Check the LVDS cable?
Replace the LCD panel?
Check IC201 (Saturn4)
Change the Main PCB
40” : BN94-02945D
52” : BN94-02945E
Yes
Yes
Yes
Input the HDMI signal properly
Yes
3
2
Check a set
in the ‘Stand-by mode’.
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN40B550K1H
Page 62: ...4 3 4 Troubleshooting L1 B13V B5V B12V B5V 1 9V B3 3V B9V ...
Page 64: ...4 5 4 Troubleshooting Pin 16 17 Pin 34 35 TP67 TP69 TP71 TP72 TP70 ...
Page 65: ...4 6 4 Troubleshooting WAVEFORMS 1 PC input V sink H sink R G B 2 LVDS output ...
Page 67: ...4 8 4 Troubleshooting Pin 16 17 Pin 34 35 Pin 12 Pin 7 ...
Page 68: ...4 9 4 Troubleshooting WAVEFORMS 3 HDMI input RX_Data RX_Clk 2 LVDS output ...
Page 70: ...4 11 4 Troubleshooting Pin 16 Pin 17 Pin 2 Pin 4 Pin 8 ...
Page 71: ...4 12 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 73: ...4 14 4 Troubleshooting Pin 16 17 Pin 34 35 Pin 2 Pin 4 ...
Page 74: ...4 15 4 Troubleshooting WAVEFORMS 2 LVDS output ...
Page 76: ...4 17 4 Troubleshooting Pin 16 17 Pin 34 35 V3CVBS COMY ...
Page 77: ...4 18 4 Troubleshooting WAVEFORMS 4 CVBS OUT Grey Bar 2 LVDS output ...
Page 79: ...4 20 4 Troubleshooting Pin 16 17 Pin 34 35 COMY COMPB COMPC ...
Page 80: ...4 21 4 Troubleshooting WAVEFORMS 5 Compnent_Y Gray scale Pb Pr Color bar 2 LVDS output ...
Page 82: ...4 23 4 Troubleshooting R416 B12V COMSL COMSR V2SR V2SL TP_L L R R DSL DSR TP_915 TP_916 B3 3V ...
Page 83: ...4 24 4 Troubleshooting WAVEFORMS 6 I2C Data 7 Speaker out ...
Page 119: ...6 6 6 Wiring Diagram Memo ...