Do I need to replace the entire LCD?

Hello.

In this last year my old macbook display suddenly lost some light, and started working very dim with poor light/contrast.

Recently it started to loose all light from the bottom of the display. First it was in the entire left side, but last week I turned it on and now it passed to the right side, please see image here:

http://imgur.com/cNM5srN

Recently I bought the latest Retina 13" version so I'm covered but I want to fix this laptop and use it for light daily tasks like web browsing.

• Since this "shadow" traveled from side to side does it mean its a software problem?
• Do I need the "Unibody LCD Panel"?
• Do I need the "Unibody LVDS Display Cable"?
• How can I make sure what is the part I need?

Looking forward for some help...

Thanks in advanced.

References:

13" Unibody LCD Panel

13" Unibody LVDS Display Cable