Chosen Solution
My computer is showing large, vertical purple lines (and one grey/green one) but only when I open the screen past 25 degrees. When I close the screen below 25 degrees, everything works fine. I have had a few different problems with this computer in the past which have been fixed under repair programs (keyboard replacement and display backlight repair).
Well, thats a bit of good news! Your display is only effected. You likely cooked your T-CON board which has been a problem in this series. Sadly, it’s been a big problem so you can only get new display assemblies! 13” MacBook Pro Fn Display Assembly - Space Grey, Apple P/N 661-0797013” MacBook Pro Display Assembly - Silver, Apple P/N 661-07971 Here’s the guide to replace it: MacBook Pro 13" Function Keys Late 2016 Display Assembly Replacement Here’s a bit more on the why Screen issues - white/negative screen fixes itself after update In your case the tilting of the lid is either cutting off the air flow or adding stress to the T-CON board connections.
