Chosen Solution
I cracked the screen on my iPhone 8 so ordered a replacement off eBay. It’s not a genuine apple. I switched the home button over, installed the screen, turned the phone on and the phone was acting really weird. It was really slow to boot, did not find mobile network signal it just displayed ‘Searching’ and then the screen just went black - the screen was actually quite responsive before this point though. I decided to remove the replacement and fit my old one, genuine appl. Now the digitizer does not work - it was perfect before. The home button works fine, phone boots normally and connects to my mobile network. Any idea what has gone wrong?
This phone will likely need motherboard work due to the fact that the replacement screen does not work and your original screen no longer works. Try taking off that foam-like sticker around the display connector, take another picture and then upload it. That should give me a better idea if anything important is missing or damaged, which right now I don’t notice anything wrong. I hope this helps!