Bootloop and screen flicker after display replacement [Xiaomi Mi9T pro]

[Rumls]

Hello, I broke my screen in the top right corner and was using it for like 2hours before the AMOLED completely faded to black. After that I've got it replaced in a 3rd party service with my new own oem display but they've returned it in a bootloop state. After a while I've noticed that it is still possible to turn it on while it is charging but with a random screen flicker and shutdowns as seen in the gif. Still I've managed to unlock it, flash TWRP and install stable release of the latest MIUI 12 ROM. Sadly nothing helped.
Current state:
- flashed twrp
- installed stable MIUI 12 ROM
- still bootloop without charging
- still screen flicker and random shutdown while charging

Any suggestions? I'm completely lost here

 

[Rumls]

Oh... sorry I'm new here. This is a forum for MI9T and not MI9T PRO.

Here is the correct thread:

https://xiaomi.eu/community/threads/bootloop-and-screen-flicker-after-display-replacement-xiaomi-mi9t-pro.57898/