Look like a bad connection, but if you have never replaced the screen there should be no reason it is not seated right. The LCD panel may be damaged, from anything. They are very fragile.
Here is the [product|IF127-000|LCD] for iPad Mini 2
new adhesive for the digitizer click [product|IF122-010|Here]
If you crack your digitizer getting it off or want to buy a new one just in-case you can get that [product|IF122-001-9|Here]
But it could be that the LCD connector is not seated right, open the iPad and check that it is fully seated before you order parts. But you will need new adhesive if you do open it.
Hope this helped you, keep us updated.
Cheers
Noah