iPhone 4S screen inverted colours and white background
I just updated my iPhone 4S to iOS 9.3.6 from 8.4.1 ( restored from iTunes on my MacBook on high sierra ) and while it was doing the restore and update i noticed the screen had gone all weird. Before updating, my screen was perfectly fine and now the issue has occurred. I set up the iPhone while the screen was ruined and I have a photo of the issue from updating below.
Earlier iPhone models