Samsung Galaxy Young 2, digitizer not working

[panoss]

In a Samsung Galaxy young 2 I replaced the LCD screen + digitizer.
The screen works fine, but the digitizer does not work at all.
I also tried it with two other used digitizers without any success.
So, I did a factory reset (volume up button + power button + home button -> Facory reset->Wipe data etc) but at some point I have to enter some data through the keyboard but the digitizer still does not work.
So the factory reset is left unfinished.

A photo of the connector of the digitizer to the LCD can be seen in the attachment.

Any help is welcome.

(the digitizer and the LCD screen is bought from Aliexpress, if this is of any importance)