Bought a Mac Mini M4 in Dec. 16 mb Ram, 250mb SSD, 2 TB External. Sequoia 15.2-15.3. My Mac Mini will suddenly go solid black while using it. Lasts for about 2-3 seconds and is fine with no changes afterword. I upgraded to 15.3 and it still continues to do it, maybe 1 or 2 times a day. Not a real detriment to using it but...
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Mac mini
It does depend on the quality of the monitor, but HDMI is, first and foremost, a TV connection. And by quality, I mean cheaper monitors often limit HDMI to the original HD resolution of 1920x1080, regardless of any higher resolutions the monitor can support under a DisplayPort or USB-C Thunderbolt connection.
That, and over the years, I've seen far too many posts here by folks trying to use HDMI. Issues which disappeared when they used their monitor's DisplayPort option.
I have an EIZO monitor that allows me to use DisplayPort, USB-C or HDMI. Given the cost of these monitors, I know HDMI would work (with a proper high speed HDMI cable), but I'm still going to use a connection meant for computer monitors before I'd even consider HDMI.
Having an HDMI port is intended for video work. It eliminates the need for a break-out box. You use DisplayPort or USB-C to a monitor for your work screen in Final Cut Pro, Avid, Premiere Pro, DaVinci Resolve, etc., and a separate HDMI output to a reference monitor (TV) to see how color will appear on a TV as you simultaneously work in your video editor.
You may be onto something regarding power spikes. Haven't monitored that closely since I never know when the screen is going to go black.
FWIW, per my other posts, the blackouts occur (at least for me) while using either HDMI or c/Thunderbolt cables. It doesn't matter which, it always happens to the "main" monitor.
I've been able to overcome it to some extent by swapping the monitor positions. IOW, it now happens to my right monitor instead of my left one which is, for me, where I do most of my work. If you sort comments by "newest" and scroll down a few you'll see what I did to accomplish that. It still happens, but only to my right monitor now so it's not as annoying.
Hope that helps until they get it sorted out.
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In my case, the ports in use are irrelevant. I've swapped out HDMI and Thunderbolt cables, switched ports on the Mini as well as my two LG 4K monitors and the blackouts continue to happen to the primary monitor no matter the configuration.
It's quite possible (probable?) that it's a software issue, but if it were a one-off software issue, it wouldn't be affecting everyone here IMO.
I tried 50Hz too and couldn't stand how jerky the mouse pointer and scrolling were. When I swapped to the USBC > DP cable, it defaulted to 144Hz and it's been rock steady now for a month. No idea why.
Got an M4 Mac mini. Get horrible blackouts with AOC 4K 32" monitor, wasn't getting any on my older Dell 27" 4K monitor but now it's started doing it on this one too.
Have bought numerous certified HDMI cables, USBC>DP, nothing helps. Really frustrating.
Mac mini M4 screen go black randomly
