Mac mini monitor strangness

[gavspen]

Nope, didnt work.

It's been fine for days, and now it 's going out for a few seconds every few minutes.

[Phil O]

Yep, I thought I had solved it. Mine was working fine for quite a while and just started acting up again yesterday. Sorry for the false hope.

Your friendly neighborhood Phil

[gavspen]

Not to worry Phil. Win some, lose some.

[Phil O]

So, it's possible that it might still be a connection problem. I noticed that I can force the issue by wiggling the connector. I cleaned the contacts with some DeoxIt and it's been holding up. With the highly intermittent nature of this problem it's difficult to say for certain, though. I may spring for the Belkin cable that Mike H suggested earlier and give that a try. $30 at the Apple store. Time will tell.

Your friendly neighborhood Phil

[gavspen]

Phil, have you tried changing the "Refresh Rate"? I read someplace to give that a try and so far it's cured the HDMI monitor, which was blacking out once in a while. Of course the problem has been intermittent, so it's hard to know yet but fingers crossed.

I only have one choice of refresh rate on the secondary monitor (which still doesnt light up at start up, but I'll live with that) so nothing to try there.

Gavin

[Phil O]

Yes, I've tried everything I can think of, including every suggestion I could find on the interwebs. Working fine now for a couple days since the DeoxIt treatment, and since the cleaning I can no longer force the problem by wiggling the connector. I guess that's a good sign but I won't start smiling 'til I reach the month or two mark.

Your friendly neighborhood Phil

[HCMarkus]

According to Apple's release notes, ‌macOS Monterey‌ 12.3.1 addresses a bug that could cause USB-C or Thunderbolt external displays to not turn on when connected to the 2018 Mac mini as a secondary display.

https://www.macrumors.com/2022/03/31/ap ... lay-fixes/

Maybe it impact HDMI, too...?