Horizontal lines at the Botton of the screen

Thanks for reaching out to the Apple Support Communities, FanApple20!

It sounds like you have an issue with the bottom of your screen having some display issues. Based on what you're describing, I suggest checking out this article for how to Reset NVRAM or PRAM on your Mac.

I also recommend taking a look at this article with steps to follow for How to use safe mode on your Mac. This will perform checks and stop certain software from starting up automatically. Once you are in safe mode, test to see if you have the same issue.

Let me know the results and have a terrific day!

I have the same problem and it’s not covered with their repair program. If appears 20-30mins after I turn my MBP on. I hope they can do something about this as we surely takes care our gadget especially that it’s a very expensive device.