Screen has backlight, but stays black
Just did someone's retina glass replacement for ipad mini, and the screen stays black. I don't see anything going on. I can see the backlight works, but nothing else does. Home button seems to work, as well as the power button, the device appears to be on when I connect it to itunes, but all I see is the backlight on like so:
and when the backlight is off:
I've down many iphones, this is my first ipad mini, but it didn't seem that hard until I tried turning it on. Connectors all seem to be seated correctly.
What could be the issue?