Half back light after screen replacement

Hello everyone, I just repaired an Ipad 4th gen today. I turned off the ipad before starting the repair. After completing the repair I turned on the device and the right half of the screen has a bad backlight. The tablet was completely off the whole repair. So I check the backlight filters and there isn't a short in them. Also oddly when the Ipad is booting up the apple logo doesn't show any bad backlight, the entire thing is little until just before it gets to the main screen then the apple logo gets half of it gone from the backlight. Can someone please help me? I tried a software update, new lcd, and a factory dfu mode reset.