Apple Event: May 7th at 7 am PT

Looks like no one’s replied in a while. To start the conversation again, simply ask a new question.

Jez2007 Author

Level 1

56 points

2018 Mac Mini - monitor problems

I have a new 2018 Mac Mini (running OS 10.14.2) which is connected to a LG 24UD58 monitor via a USB3 to DisplayPort cable.

When I shut down the Mac and then try to start it up again, the monitor is blank and does not appear to be receiving a signal from the Mac. I had the same problem when using another monitor (my old Dell U2312HM) using the DisplayPort cable.

When I connect both monitors (the LG via Display Port; the Dell via an HDMI), I am able to shut the Mac down and then start it up again, with both monitors working.

There are other users with similar problems.

Is there any fix?

many thanks

Mac mini 2018 or later

Posted on Dec 21, 2018 10:12 AM

Best reply

dan182j

Level 1

9 points

Posted on Feb 1, 2019 9:45 PM

I just got my first Mac Mini/Mac Desktop and i'm having the same issues with 4K monitors. After messing with settings and finding out that something is keeping the video card from running, so i decided to turn off FileValut. Reason why did that because it seemed weird the monitors wouldn't come on, but when i first set it up the MacMini and rebooted a few times it worked perfectly. The only thing i did after setting it up was enabled FileVault. So i powered on my Mac and waited a 30 seconds then clicked my mouse and type in my password like i always do on my MBP. That worked and i was able to see it fire up and my displays worked.

So disabling FileFault is what I did but its for sure not the most ideal fix. I would love to have my hard drive encrypted, but it resolved it for me for now. Guess i'll have to use another way to encrypt the hard drive to see if that breaks it as well. Thought i would share that with anyone that is wanting to test it out.

View in context

455 replies