iPhone X boot loop when the digitizer is connected

Hello IFixers,

The screen of my IPhoneX went completely black after I dropped the phone into the pool.
(First some green lines then just black)

I bought an original refurbished screen from eBay and installed it yesterday.
When I power on the phone it starts looping during the boot process. It shows the apple logo for a few seconds then it shuts down and starts again.

I tried several things, including isopropyl alcohol bath for the logic board, but nothing helped.

Then I tried to disconnect the digitizer and the phone booted without any issue and the screen looks perfect.

I checked the digitizer connector on the board and on the flex cable, but couldn’t see any damage on those.

Could it be a faulty digitizer? The seller told me that it was fully tested and in working condition.
Or maybe the logic board is damaged permanently?

Do you have any suggestion?