I have spent days on this and am only asking a question because it seems like my problem is different than any other.
I have an iPad Mini 2 (A1490) that I replaced the screen/digitizer/lcd on. When I was done repairing and connected the battery I tried turning it on and it showed the apple logo and then flashed to black and stay black.
Although it is black, the device is on because when I hold the home button I hear the siri tone and when I hold the power and home button to do a reset, it flashes the logo again and proceeds to turn on again but with a black screen the entire time. I would think if it was the backlight fuse issue that it wouldn’t show the screen with the backlight on at all, which it does for a second when the device is reset or powered on after the battery is connected.