FIXED (workaround): Mac Mini HDMI not working - now working

[aidan181]

Holy christ. It works perfectly, I thought it was the issue with my HDMI port. But somehow your way works @@

 

[rMadruga]

After some people saying about the refresh rate, all I did was changing it to 60Hz. My monitor is 155Hz and it was set to 144Hz in my Mac Mini.
If you have an MacBook (I think iPad works too), just connect it to the Mini via screen sharing (it must be in the same Wi-Fi network) and change the refresh rate to 60Hz. If you can’t connect the Mini into your Wi-Fi, well, you have to find a way to change the refresh rate.
I did it with the HDMI/HDMI cable already connected to the monitor and it returned from black screen in a blink!


Regards from Brazil!

 

[Helpfixit]

MAC MINI 2014 - WINDOWS 11 - WIDOWS BOOT LOGO & BLACK SCREEN - FIXED

I installed Microsoft Windows 11 on an older Mac Mini (2014) and encountered an issue where the system would boot to the Windows logo but then transition to a black screen. Interestingly, if I unplugged and then reconnected the HDMI cable, the Windows login screen would appear.


The issue was related to the display refresh rate being set to 29.98 Hz. When I adjusted the refresh rate to the supported 30.01 Hz, the Mac Mini was able to boot into Windows normally without any further issues.

 

[Nighttraine12]

HDMI from Mac Mini to a TV or monitor not working? I had that problem too.

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Fairly new Mac Mini, and our only display is a 2019 Samsung 50" TV.

The TV says "No Signal" whether using a HDMI cable from the HDMI port, or the USB-3 to HDMI cable. Tried various combinations of ports and cables.

I found one way to make it work:

1. Make sure Mac Mini is switched off
2. Turn the TV on, and select another HDMI port than the one used by the Mac Mini (whether there's a signal or not, doesn't matter)
3. Click the Source button on the TV remote control, and arrow to the side to highlight the HDMI port number where the Mac Mini is connected to, but do not select it until ...
4. Click the "enter" button on the remote, to select that HDMI port number, while simultaneously switching the Mac Mini on.

When doing this, all is fine - the picture comes on as it should (after a few seconds).

Anything else I do, any combination of cable I try, doesn't work. But this seems to consistently work.

My guess is that the Mac Mini is looking for an HDMI when it's starting, as the TV is looking for an HDMI source when you select that input. They apparently only do that for a few seconds (maybe 10 seconds?), and if they don't do it at the same time - no picture. The TV will say "no signal" and give up. The Mac Mini will say "No HDMI connected", and also give up. Unless they look for each other at the same time.

Not ideal, but at least I have found a consistent way to make it work.

Anyone else with HDMI problems on a Mac Mini, please try this procedure and see if it works. If it works to fix this, Apple and/or Samsung should be able to "meet somewhere in the middle" and make a permanent fix for this problem. One more guess: They will both blame the other party for not conforming to whatever standards rule HDMI ...

I found a thread that said on an LG TV if you have this problem to turn on the ultra deep function on the tv, it immediately fixed my mini Mac not displaying on the TV screen. Prior to changing the setting all I had was no signal displayed on the screen and as soon as I changed that setting the problem was fixed.