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User profile for user: allen.li
allen.li Author
User level: Level 1
5 points

External monitor turns all green after MacBook wakes up

Sometimes after my MacBook wakes up from a sleep, the external monitor turns all green. I can still move the mouse cursor to that screen, but can't see anything else.


About this Mac: MacBook Pro (13-inch, 2017, Two Thunderbolt 3 ports)

OS: macOS Mojave version 10.14.3

Graphics: Intel Iris Plus Graphics 640 1536 MB

Monitor: Acer CB281HK https://www.acer.com/ac/en/GB/content/professional-model/UM.PB1EE.001


Every time this occurs, it is fixed by restarting the computer. So I'm suspecting it might be a software issue.


Hope to hear if anyone knows the cause, and if there's a way to get around it without having to restart.

MacBook Pro

Posted on Mar 15, 2019 4:00 PM

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User profile for user: MoonJ.
MoonJ.
User level: Community Specialist

Mar 17, 2019 9:10 AM in response to allen.li

Greetings allen.li,


Thanks for visiting the Apple Support Communities! I understand the display on your external monitor unexpectedly appears green at times when your MacBook Pro wakes from sleep.


I suggest ensuring your Mac is updated, testing with a new cable, and testing if the behavior occurs when the power adapter is connected with your Mac. You can see these steps outlined within the following guide: Get help with video issues on external displays connected to your Mac


Let me know how it goes from here.


Cheers.

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External monitor turns all green after MacBook wakes up

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