pink vertical line in screen

@keval18229 you are not giving us a lot of history here. We would need to know if anything has happened to the phone prior to this, or if this just all of a sudden happened by itself. This is most likely a bad display. While you open your phone to work on it, double check the LCD connector. Make sure it is properly inserted, does not show any damage, corrosion etc.

Since iFixit does not yet have a specific guide for this, use something like this video replacement screen are readily available at many online stores.

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!