M1 Mac Mini LG Ultrafine 32" Monitor Periodic Black Screen Fix

Question

Level 1

4 points

M1 Mac Mini LG Ultrafine 32" Monitor Periodic Black Screen Fix

I have an M1 Mac Mini and upgraded the monitor this year (model 32UP83AK-W). Great monitor, but I started encountering the black screen problem some others have listed. Essentially, while using the monitor, it would drop the display and show a black screen for 1-2 seconds, then start displaying again.

The monitor had a sixth sense to only do this while I was concentrating on something like Xcode or Numbers.

After reading about the other problems with LG monitors, I tried switching the display frequency from 60 Hz to 30 Hz. This seems to have removed the problem. There is a barely perceptible lag in normal activities, but not enough to be disconcerting.

Does anyone know if there is a way to get the LG firmware level through MacOS, System Settings or anything else?

Mac mini, macOS 26.5

Posted on Jul 3, 2026 9:21 PM

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Answer 1

rjldubois

Level 3

658 points

Jul 3, 2026 11:32 PM in response to HankMurphy

Hello HankMurphy, and welcome to the Apple Support Community.

Changing from 60 Hz to 30 Hz improving the issue may indicate a problem related to the display connection, cable, or how the external monitor is handling the video signal.

You can try these steps:

Make sure your Mac mini is updated to the latest available macOS version.
Try another compatible high-quality HDMI or USB-C/Thunderbolt cable.
Disconnect and reconnect the display, then check:
System Settings > Displays
and verify the resolution and refresh rate settings.
Test another port on the Mac mini if possible.

For the LG monitor firmware, updates are usually provided through the display manufacturer’s own software or support resources, not directly through macOS System Settings.

Useful links:

Connect displays to your Mac - Apple Support

Use Bluetooth accessories with your Apple TV - Apple Support

Please let us know if changing the cable, port, or display settings resolves the black screen issue.

Your feedback may help other Apple Support Community users with similar external display problems.

🙏🏻

Have a nice day.

And one more thing…

Never forget to think different.



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Answer 2

Jul 5, 2026 7:21 PM in response to HankMurphy

Exactly what model LG UltraFine is this? (or a link to its exact specs)

What cables, adapters and Docks are being used to make the connection to the display? please mention EVERY item in the chain.

also, how long are these cables?

what sort of work are you doing on this display?

How important is 10 bits/color (billions) Vs 8 bits/color (millions)

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