my 2019 MacBook Pro suddenly developed partial screen issue upon starting up.Its difficult to enter PW if you can't see it! the top half of screen is black and midway down is the top of the start up page. Its temporarily resolved by connecting Mac to an external monitor.any suggestions as to cause/repair?
[Re-Titled by Moderator]
Original Title: 2019 mac pro 15 with a screen issue
MacBook Pro 15″, macOS 15.5
First, let’s see if this issue happens in Safe Mode:
If the strange behaviors do not occur, then it may possibly be a software issue.
If the issue doesn't continue in safe mode:
Leave safe mode by restarting your Mac normally, then try to reproduce the issue.
If the issue doesn't return, it might have been resolved by the other things that safe mode did at startup, such as checking your disk and clearing caches.
If the problem persists, then let’s try this:
If none of those ideas work, then I recommend service.
Service Checklist:
Click ▶︎ Start a Service Request. ⚛️
Need more help?
Click ▶︎ Check Repair Status. 🔧
Good luck! 👋🏼😉
First, let’s see if this issue happens in Safe Mode:
If the strange behaviors do not occur, then it may possibly be a software issue.
If the issue doesn't continue in safe mode:
Leave safe mode by restarting your Mac normally, then try to reproduce the issue.
If the issue doesn't return, it might have been resolved by the other things that safe mode did at startup, such as checking your disk and clearing caches.
If the problem persists, then let’s try this:
If none of those ideas work, then I recommend service.
Service Checklist:
Click ▶︎ Start a Service Request. ⚛️
Need more help?
Click ▶︎ Check Repair Status. 🔧
Good luck! 👋🏼😉
On an Intel Mac—
Try resetting NVRAM/PRAM Reset NVRAM on your Mac - Apple Support
Try resetting the System Management Controller Reset the SMC of your Mac - Apple Support
no progress—
A SafeBoot Start up your Mac in safe mode - Apple Support will sort many anomalies
no resolve—
try the User Diagnostics to test your Mac
Use Apple Diagnostics to test your Mac - Apple Support
In or out of warranty you can get a free over the counter 'Apple Service Diagnostics' test /assessment
Make an appointment for a "hardware issue"
Genius Bar Reservation and Apple Support Options - Apple
Outside the USA
Contact Apple Support - Apple Support
2019 MacBook Pro shows black screen on top half
