Want to highlight a helpful answer? Upvote!

Did someone help you, or did an answer or User Tip resolve your issue? Upvote by selecting the upvote arrow. Your feedback helps others! Learn more about when to upvote >

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

cyeoman06 Author

Level 1

46 points

Monterey 12.3.1 External Monitor/Display Issue - No Longer Outputting Signal

After updating my Mac Mini today to 12.3, my monitor now no longer displays an image via USB-C, just keeps saying on no signal on the monitor.

I have tried HDMI and same issue. The odd occasion it will display a picture but once I shutdown or restart the mac mini it does not display a picture. The mac is booting up. I have had to resort to connecting it to my old TV with HDMI connection.

This is so frustrating

I have tried resetting the SMC which had not appeared to work, also tried downgrading the displayport version from 1.4 to 1.2 (on the odd occasion I did get a picture) but that has not worked either.

Has anyone else having this issue?

The monitor I use is a BenQ SW270C.

This is really doing my head in and was wondering if anyone else has got a fix to this.

[Re-Titled by Moderator]

Mac mini, macOS 12.2

Posted on Mar 17, 2022 12:48 PM

Best reply

abhage

Level 1

12 points

Posted on Jun 1, 2022 9:43 AM

Apple - you have purposefully made this as hard f*****g possible to remediate because, unlike Windows, you are so arrogant in your OS updates (that you clearly do not QA at all), that you offer no downgrade option. ALL - this is the definitive solution that I employed THREE (3) WEEKS prior and I have not had ANY issues since then,

Backup your entire SSD via direct connected Time Machine. If you are like me with a large SSD, congrats, APPLE FORCED YOU TOO, to spend $500+ on on an Samsung 4TB external SSD (link) where you can use this USB-C to SATA connector (link) - all regular links to US Amazon; sadly, I have no referral code/links.
Download version 12.1 from this site (link)
Create a bootable install USB key (link)
Boot into safe or recovery mode and re-partition your entire SSD (this wipes the entire computer FYI, but is the ONLY OPTION APPLE has made available at all...)
1. FYI - at this point I recommend that you just hardware your laptop into your router or switch and bypass Wi-Fi; its faster and easier.
Set up the "new laptop" as fast a possible; your going to wipe the entire "new"/"temp" user anyway.
Restore Mac from Time Machine backup (link) - delete that temporary user from the prior step; wait like 4 hours maybe (that's about how long my 3.4TB SSD restore took.
No more issues. For weeks, blissfully easy use once again.

** Apple, you owe me 20+ lost billable hours or work, at least many hours in lost work, and over $500 for having to purchase equipment only need to remedy your insane f*** u*; congratulations, QA and OS teams - those I doubt you were the ones who made the decision to focus on continually increasing levels of completely dumbs**t; but at least we have a **** ANIMOJI...might as well be your new logo.

View in context

Monterey 12.3.1 External Monitor/Display Issue - No Longer Outputting Signal

Similar questions