Service manual

4-17

4. Troubleshooting

4-1-7. No Video (Video CVBS)

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

Major

checkpoints

Check the Video CVBS source T

Check the Chelsea. T

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

Diagnostics

Power indicator LED is off.

Lamp(Backlight) on, no video ?

Check the video source and

check the connection of video cable?

Check the LVDS cable?

Check the T-Con B'd?

Replace the LCD panel?

Does the digital data appear at

TP-E_TXCLK+, E_TXCLK- ,

O_TXCLK+, O_TXCLK-?

Does the CVBS data appear at

TP - AV_CVBS?

Check a set in the 'Stand-by mode'.

Input the video source properly.

Please, Contact Tech support.

Check IC1102 (SX1).

Change the Main Assy.

Check CN801.

Change the Main Assy.

Yes

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