This MacBook Pro 13" 2017 started to show this screen horizontal lines problem two years and six months after purchasing it.
The lines started showing after 1-2 hours of usage, and it will be worse when i force to use it.
Here are some images of the lines.
MacBook Pro 13″, macOS 10.13
Usually lines like that are caused by a defective Display Assembly. To confirm try connecting an external display and enable mirroring. If the issue does not occur on the external display, then you know the built-in Display Assembly is bad and needs replaced. If the external display shows the same problem, then it means you either have a GPU/Logic Board issue or a software issue.
Horizontal Black Lines on Macbook Pro 2017 Touchbar Screen
