Backlight Not Working and Gets super Hot When Screen Is On

After checking the backlight filters due to a different lighting issue, i put everything back together, the screen came on for just a second and then the backlight went completely out. Also, when i have the screen on i can feel the case right under the board getting very, very hot within a minute or so. As soon as I lock the screen it starts to cool down.

I actually work for a 3rd party Apple repair place so I know what I'm doing, my boss just isn't here for me to ask today.

Any and all help is highly appreciated.

Update (02/17/2016)

One of the diodes blew out. Not sure why though because we just replaced one. But would that explain it getting too hot? And could there be something that keeps making the diodes go out?

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