Samsung LE32B450C4H - 4-1-5. No Video (Tuner

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4-10

4. Troubleshooting

4-1-5. No Video (Tuner_CVBS)

Symptom Audio is normal but no picture is displayed on the screen.-

Major

checkpoints

Check the Tuner CVBS source.

Check the Tuner, Check the Chelsea.

This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected.

Diagnostics

Change the Main Assy

Yes

Does the CVBS data appear at

#9 pin of Tuner?

Yes

Power indicator LED is off.

Lamp(Backlight) on, no video?

Yes

Check the RF source and

check the connection of RF cable?

Input the RF source properly.

Yes

Check Tuner

Change the Main Assy

Yes

Check the LVDS cable?

Check the T-Con B’d?

Replace the LCD panel?

Please, Contact Tech support

Does the DC TU5V_PW, TU33V_PW

appear at #3, #5 Pin of Tuner?

Does the digital data appear at

Pin #19,20,34,35 (LVDS Data clk)

of LVDS connector?

Check IC4010 (Saturn4)

Change the Main Assy

Check a set

in the ‘Stand-by mode’.

Caution Make sure to disconnect the power before working on the IP board.

Samsung LE32B450C4H - 4-1-5. No Video (Tuner_CVBS)