Laptop MB Zenbook UX31E i5, no power to the LCD LED lights

[dimiwk]

Laptop MB Zenbook UX31E i5
No power to the LCD LED lights.

The Motherboard is Zenbook UX31E i5, 60-n8nmb4F00-b03.

I recently got this laptop Zenbook UX31E second hand.
I disassembled it to replace the LCD screen.

While attempting to reatach the LCD cable to the internal socket on the MB for the LCD display, when the 2 sockets were not completely positioned but still touching each other,
I heard a short cracking noise and I smelled burned.
After this moment the LCD would not power on!

I did the mistake of plugging sockets without detaching the battery!

HDMI to External display works and the laptop is functional with external display.
However the internal display does not work.

I found a burned SMD capacitor on the back side of the board.
MB back side.
http://s22.postimg.org/mcp7i01sh/20151219_210208.jpg

I got it replaced by a professional very carefully.

There is a small burn on 2 of the pins of the screen conector on the MB.
But I think it is not preventing them to send signal. The middle part of the pins looks not burned.
MB LCD Connector:
http://s14.postimg.org/9lk0544bl/201...34_resized.jpg
Front Side of the MB:
http://s7.postimg.org/ja4pj1b2j/2015...39_resized.jpg

After replacing the capacitor there is a almost completely dark image on the display. The data channel towards the LCD looks like its working now.

However.
The LED lights that are supposed to brighten and light up the screen are not powering on.
There is a short I guess somewhere.

This guy that helped me said that he needs a diagram for the MB to look further. He is not particularly specializing in laptops.

I am guessing for a professional that deals with this particular stuff this should be relatively easy problem. There is no visual damage on the board.

Any help? Where could I get diagram or information what to look for?

[dimiwk]

Re: Laptop MB Zenbook UX31E i5, no power to the LCD LED lights

Hello again,
and Happy New Year!!

I got a replacement board which is almost identical.
I could compare the elements one by one between the 2 boards.
The new board has slightly weaker CPU (90% of the original).

With the new board I could try the LCD.

I would appreciate any advice how to measure the elements between the boards.
Including simple instructions. I do have a multimeter but I've used it rarely, only for simple tasks.
Also, how to minimize time and effort.

Thanks!