Black bars across my screen a year ago and it kept getting worse until I sent it to Apple repair. Heard this happens a lot to Macbook Pros because of wonky flexor
Fixed: MacBook Pro Booting Black screen | SoftwareKeep
macos - Black screen on MacBook Pro login - Ask Different
Is Your MacBook Screen Black or Blank? Try These 7 Potential Fixes
Backlight on Black Screen with MacBook Pro 2016 15" | MacRumors Forums
Fix: Black Screen After macOS Big Sur Update (4 Ways) - Saint
MacBook Air screen is black with colored … - Apple Community
How to Fix MacBook Pro Black Screen of Death - OSX Tutorial - YouTube