Screen display is broken

@heli8138 there is not a whole lot that you can do. It is time to replace your display. Since iFixit does not yet have a guide for that use something like this video Replacement screens are readily available at many online sites.

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has a device with the same issues as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.

Repair is War on Entropy!