Display issues with iPhone 7 after opening

[booksrus20]

Yesterday, I opened my iPhone to fix a noise issue. I fixed it once before by tightening some screws. The first time, it worked perfectly. This time, after I fixed it, I closed the case and the display was messed up. I'm assuming I damaged something. Can anyone tell me what part is damaged? I can still use the phone and the degree to which it's messed up varies. There is a purple bleed in the upper left corner. A line across the top and vertical white lines. It will also open apps on it's own. I noticed that some of the black covering is worn off. Could this be the issue? Thanks!

 

[BugeyeSTI]

Needs a new display most likely... You could go back inside and make sure all the connectors are secured but its possible you damaged a ribbon cable..