Hi, I changed battery and cracked screen on my iPad PRO 12.9". What did I do: (1) I first removed the screen, following...

Hi Mark, Thank you very much for your extensive answer. The iPad is the exact one as described above (A1584). Both parts from iFixit; (1) IF323-022-1 iPad Pro 12.9" (2015) Screen / Part Only / New / (2) Black (3) IF323-038-1 iPad Pro 12.9" (2015) Battery I checked the screen connectors on the board (zoomed in with my cellphone). Nothing looks wrong with it. Important troubleshooting/deductive information: (1) When I had exchanged the battery and plugged in the screen, you could see that it worked (accept for the huge crack of course). (2) After this I removed the home button. (3) After putting the home button on the new screen, the new screen didn't work. (4) I tried putting back the home button to the old screen - the screen didn't work anymore. (5) In both situations, if I plug in the adapter, you hear the "bleep" that indicated the battery charging. So the question now is: Could it be the home button? If this one doesn't work/is damaged, does the screen remain black? I already tried the reset (power +...