switched from the lg to the AU optronic

my macbook came with the LP116WH4-TJA3 (LG Phillips)

I was thinking and got B116XW05 V0(http://www.ebay.com/itm/261841301473?_tr...) is there a way the backlight wouldnt work because i switched from the lg to the AU optronics? I bought 2 of them because i thought the first one I broke but I guess it wasnt me. If you are right im gonna buy the same model LG phillips one again but its more money so if you could help me out. The display works but not the backlight when both worked before.