Ipad mini 2 lcd signal problem

Hey all, so I repaired this ipad mini2 (i've done like 100 before). And now I damaged the motherboard in some way. The backlight works but I only get a black screen. I'm looking for a damaged chip or connector but I can't find anything. Anyone had experiences with this and knows where or which chips I need to be looking for. A schematic would be nice too!

Thanks in advance!