Screen Display
My Mac Book is hot and there is a black streak on the screen. What is going on?
Hi,
Run Apple Diagnostics if it reports something.
https://support.apple.com/en-us/HT202731
If it doesn't report anything, you'd better contact Apple support or make Genius Bar reservation to tell them the circumstances you face with right now.
https://www.apple.com/retail/geniusbar/