iPad mini 3 connect to itunes after NAND replacement

Aup everyone. I’ve replaced NAND on ipad mini 3, restored it using iTunes. iPad switched on alright but after choosing language and region it says connect to iTunes.

When connected to iTunes, iTunes says there is a problem with iPad and please contact repair centre. Do you have any solution for this problem?

Bare in mind it’s not a first NAND replacement I’ve done so far 🙂