Display Issue iPhone 8

Hi,

Has anybody seen an iPhone behave like this? Please view photos.

I have changed 3 original screens but it doesn’t seen to be a screen issue.

If it is a Logic board issue where should I look and what should I look for? What line?

I was hoping that somebody has seen this before and would recommend where to look to fix it. I have never seen anything like this on any phone.

Turn phone on, get one line through the apple logo across the screen. Then screen turns blue with lines all through it for a second before loading. Then when screen lock is on, tilt phone up for a second it blinks with blue screen with lines then normal home screen pops on. Like I said please view photos.

Please let me know.

There is also a ghost type issue

Cheers