Pink screen on start up with new monitor

I just picked up a new monitor from LG (34WN750) that flashes a pink screen only on start up/booting up. There are no issues when the monitor is turned by itself without the computer, sleep and awaken when connected to the computer.

I was previously using an LG 34UM69G and Samsung SJ55W without issue.

The Computer is a Macmini 2018 on Catalina 10.15.17

Mac mini, macOS 10.15

Posted on Nov 29, 2020 8:58 PM

Similar questions

Pink screen issue on external monitor (macOS Catalina 10.15.5) Hello Team, I am facing issues when connecting 2nd Monitor as its showing pink screen mirrored with 1st Monitor. 1st Monitor works fine only 2nd monitor is having issues. Troubleshooting Steps done so far :- 1) Updated MacOS to version 10.15.5 (19F101) 2) Tried unplugging and plugging back the cables I am using docking station to connect to my monitors, If I remove HDMI cable on 1st monitor, 2nd Monitor who was having issues (using VGA adapter) is no longer having any issues and if i remove VGA Cable then Monitor 1 still works fine. 3) I have a Windows Laptop and it works fine on that 4) I had also tried modifying directory System/Library/Displays/Contents/Resources/Overrides by using video link https://www.youtube.com/watch?v=cDNvpYGIl_4 but that didn't help. sh-3.2# chmod 777 /System/Library/Displays/Contents/Resources/Overrides/ chmod: Unable to change file mode on /System/Library/Displays/Contents/Resources/Overrides/: Operation not permitted 5) on Display > Arrangement I see only 2 screens ideally there should be 3 I am guessing that could be the crux of the issue. Please let me know if there is any thing else you like me to try.
3696 2
Mac Mini blanks out randomly for a few seconds and then comes back on I have a new Mac Mini 2022, paired with a new HP M27FQ monitor. Installed with all the defaults, the monitor will go blank for a few seconds and then the screen contents will reappear. Occurs randomly. Cannot see anything in the logs. Tried changing the default display settings without much effect. How can I determine if my monitor is compatible with the Mac mini? Is there a list of compatible monitors?
1091 8
lg ultrafine 5k blinks to black screen macOS Monterrey the long-standing issue with the LG Ultra Fine 4K & 5K monitor blinking or going to black screen intermittently. I have followed the threads and tried all of the solutions stated. like using the LG software for auto-start and removing hard disks or other magnetic fields from near the monitor. I've gone to the point of only my MacBook Pro 2019 i9 and the monitor alone together. none have worked. i have also dug into the solution of removing the windows server file from the ~Library/preferences/myhost. also removed all remants of LG software to start fresh and clean. my heart stood still for a moment with the hope and prayer that the update to 12.3.1 Monterrey might fix. To no avail. Now it is worse than ever. It blinks so fast and frequently I cannot work on it. Since apple developed with LG for use for the apple computers since they had stopped making apple monitors I would hope someone can really get to the bottom of this. this monitor has been fantastic! when sitting next to my 5K iMac I can swear the image is superior. but this is utterly terrible. can anyone help? apple?? desperate to get my work done and pay the bills here. faithful apple loyalist since 1996.
2956 8

4 replies

StanleyG.

Level 4

2,959 points

Nov 29, 2020 9:30 PM in response to ryanqc

Your monitor is starting up faster than your mac. No compatibility issue. Monitor is just expecting information when the MacBook isn't sending any. It'll be fine to ignore.

hcsitas

Level 6

13,964 points

Nov 29, 2020 9:18 PM in response to ryanqc

Ignore...

ryanqc Author

Level 1

10 points

Nov 29, 2020 9:28 PM in response to hcsitas

Is it a problem with my Mac, the monitor, or is it a compatibility issue?

hcsitas

Level 6

13,964 points

Nov 29, 2020 9:31 PM in response to ryanqc

It’s normal startup, no problem.

This thread has been closed by the system or the community team. You may vote for any posts you find helpful, or search the Community for additional answers.

Pink screen on start up with new monitor