No Video (Video CVBS)
Symptom
Audio is normal but no picture is displayed on the screen. -
Major
checkpoints
Check the Video CVBS source -
Check the Main Chipset. -
This may happen when the LVDS cable connecting the Main Board and the Panel is disconnected. -
Diagnostics
Does the CVBS data appear at
PIN - COMP2_Y_CVBS ?
Does the digital data appear at
TP-E_TXCLK+, E_TXCLK- ,
O_TXCLK+, O_TXCLK- ?
Yes
Yes
Yes
Yes
Check a set in the 'Stand-by mode'.
Input the video source properly.
Please, Contact Tech support.
Check CN502_NEU.
Change the Main Assy.
Check IC1111 (X5).
Change the Main Assy.
No
No
No
No
No
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?
4
2
Caution Make sure to disconnect the power before working on the IP board.
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