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4-5
4. Troubleshooting
4-1-3. No Video (HDMI - Digital Signal)
Symptom
Audio is normal but no picture is displayed on the screen.
-
Major
checkpoints
Check the HDMI source
Check the MSD2248AL
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.
-
-
-
Diagnostics
Check JA7001, JA7002, JA801S(SIDE),
HDMI cable.
Change the HDMI cable. Change
the main PCB assembly
No
Yes
Does the digital data appear
at output of R7049, R7050(CLK-/+),
R7051~R7056(DATA)?
No
Yes
Power Indicator is off.
Lamp(Backlight) Off, no video
Yes
Check the HDMI source and check
the connection of HDMI cable?
No
Input an HDMI signal.
Check the connected cable.
Yes
Check IC3001
Change the main PCB assembly
Check the LVDS cable?
Replace the LCD panel?
Please, Contact Tech support
No
Does the signal appear at
R7049, R7050(CLK+/-),
R7051~R7056(DATA)??
4
5
Yes
Does the digital data appear at
output of R3082F~R3095F?
No
Check IC4001
Change the main PCB assembly
7
Caution
Make sure to disconnect the power before working on the IP board.
Summary of Contents for LN26A330J1D
Page 7: ...1 4 1 Precautions Memo ...
Page 127: ...5 104 5 Exploded View Part List Memo ...
Page 131: ...4 4 4 Troubleshooting WAVEFORMS 1 2 PC Input V Sync H Sync 3 LVDS Out CLK ...
Page 139: ...4 12 4 Troubleshooting WAVEFORMS 6 Tuner CVBS Out Pattern Grey Bar 7 TS DATA Out Clk Data 0 ...
Page 159: ...4 32 4 Troubleshooting Memo ...
Page 160: ...6 1 6 Wiring Diagram 6 Wiring Diagram 6 1 26 Wiring Diagram ...
Page 161: ...6 2 6 Wiring Diagram 6 2 40 Wiring Diagram ...
Page 162: ...6 3 6 Wiring Diagram ...
Page 164: ...7 1 7 Schematic Diagram 7 Schematic Diagram 7 1 Internal Block Diagram of Scaler MSD2248AL ...
Page 165: ...7 2 7 Schematic Diagram 7 2 SCHEMATIC Block Diagram ...
Page 166: ...7 3 7 Schematic Diagram 7 3 SlimHalf Tuner Diagram ...
Page 167: ...7 4 7 Schematic Diagram 7 2 Schematic Diagrams 7 2 1 STANDBY ...
Page 168: ...7 5 7 Schematic Diagram 7 2 2 FUNCTION KEY 7 2 3 LCD OPTION ...
Page 169: ...7 6 7 Schematic Diagram 7 2 4 FBE ...
Page 170: ...7 7 7 Schematic Diagram 7 2 5 ATSC HALF NIM TUNER 7 2 6 DVI SOUND INPUT ...
Page 171: ...7 8 7 Schematic Diagram 7 2 7 HDMI INPUT ...
Page 172: ...7 9 7 Schematic Diagram 7 2 8 SIDE HDMI CONNECTOR 7 2 9 SOUND AMP ...
Page 173: ...7 10 7 Schematic Diagram Memo ...