iPhone SE in boot loop after screen replacement

Our iPhone SE (2020) was dropped and the screen then stayed black. The phone still vibrated, made sound, it was even obvious that someone was trying to make a call, only the screen stayed black. The solution seemed obvious: replace the screen.

This I have done, and the replacement screen works! I see the Apple logo light up when I connect the iPhone to the PC, however... the iphone is in a reboot loop.

What I have already tried:

- Attempting to restore the iphone via itunes, itunes finds the iphone when I manually activate the DFU mode, gives a message that the iphone needs to be restored, downloads the iOS version, but then makes the iphone reboot, which puts it back in the loop. When I manually activate DFU mode again itunes says it failed, and I have to try again. Of course the result is the same every time.

- I have read that it could be a problem in the proximity sensor or the home button, so I disconnected both and only connected the ribbon for the screen. As yet, the phone ends up in the loop.

- I disconnected and reconnected the battery connector.

the iphone only seems to turn on when I connect it to the computer, as soon as I pull the usb cable out the iphone also turns off. While the battery was in good condition.

Does anyone have any other ideas