Laptop: MacBook Pro 15" 2019
OS: macOS Catalina 10.15.7
External monitor: Dell U4919DW
My external monitor flickers when I connect it to my MacBook Pro. I have tested both its USB-C input and DisplayPort input.
Is this a known issue? Is there a definitive fix available for it?
Thanks.
Hey Batmanian,
If we understand correctly, the external monitor will flicker when it is connected to the MacBook Pro. We would recommend you use this article to help troubleshoot the issue.
Get help with video issues on external displays connected to your Mac
Please don't hesitate to let us know if the steps resolved your issue or if you need additional assistance.
Thank you for using Apple Support Communities. Have a good one.
Hey Batmanian,
If we understand correctly, the external monitor will flicker when it is connected to the MacBook Pro. We would recommend you use this article to help troubleshoot the issue.
Get help with video issues on external displays connected to your Mac
Please don't hesitate to let us know if the steps resolved your issue or if you need additional assistance.
Thank you for using Apple Support Communities. Have a good one.
Thanks. Resetting the NVRAM and SMC resolved the problem.
I have seen this tip on various websites, but I was curious:
The flickering has started occurring again. Oddly it happens when I connect my 2019 MacBook Pro to my external display but it doesn't happen when I connect my M1 MacBook Air.
I can ask my employer to send me a replacement. Hopefully the next unit will work well.
External monitor flickering
