820-00239 No Backlight - Output volt is 54.45v

[bharataus]

Hi !

On this mackbook 820-00239 I have No Back-light Issue.
output volt is 54.45 .

While testing the back light circuit once i measured 45v on output, I check the screen It has image and was showing apple logo with back light on, I thought its working.
but when i pack it up it still has no back-light and showing 54.45v on output.


I have tried motherboard on another mackbook which has working screen, but still no luck.

Can anyone guide me to the right direction ?
thanks

 

[2informaticos]

54V means no connection with LEDs strip from LCD assembly.
If still same with known good assembly, then you must have bad LCD connector, or video cable.

 

[JohnB8812]

54 volts means no load. Bad screen or cable