[Xiaomi mi 2a] Touch screen does not work after display replacement - Xiaomi Mi A2 / 6X Questions & Answers

Hi, I am new on this forum. So let me known if I used wrong thread I hope I made all fine.
I have problem with my xiaomi mi a2 (mi 6X). I've changed display, because it was broken ( fell out my pocket).
After I've changed display ( screen with digitalizer and frame) it stop working ( no reaction on any touch).
Old broken display was working, before I've changed it to new one.
Now, old and new display does not react on any touch. I've tried few new displays and results are always the same.
I've tried also:
- phone restart,
- factory reset,
- flash new orom,
All above actions does not help. What can I do more?

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I attach photos.
attach.en.miui.com/forum/201705/25/220903lltvgdtnhbjtls8b.png
attach.en.miui.com/forum/201705/25/220907zz41p1z4pmgn1hhs.jpg

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