Why does the display not work after connecting the home button?

Ok, just solved the problem. The only way to fix this issue, for me, was to boot up the iPhone without the home button connector connected to the logic board and while it was booting connect it. The home button and touch ID work completely fine and the iPhone functions normally... I have no idea why this would work but I'm very relieved! Thank you guys for the responses :)

Ok, I recently fixed the problem! After trying every possible way the only thing I could think of was to connect the home button connector to the logic board while the phone was booting up. When I did this the phone miraculously did not go black and it booted up! I thought the home button may not work especially touch but I was wrong. Completely functional and the touch ID worked just as it was originally. So happy that this random trick worked and am still curious why this would work but anyways, thanks for all the answers I hope this may help someone else with this issue!