External monitor turns all green after MacBook wakes up

Question

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

Reply

Answer 1

MoonJ.

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.

Reply

Quick Links

External monitor turns all green after MacBook wakes up

Similar questions