Mac Mini (2012) HDMI losing sync (blank screen/snow)

Ciccilleju wrote:

[...] and they should change something on the videocard/motherboard to fix it. [...]

In the mean time, if they need to fix the videocard/motherboard, it would be very welcome that they use this modification chance for adding either discrete or external NVIDIA/ATI GPU support to the new Mini. Really welcome (either that, or release the new Mac Pro before Christmas, as no new Mac from the current line meet our needs in this moment).

I have the same issue with my 23.5" LG LED 1080P monitor. I know this has nothing to do with the monitor, becase my monitor works perfectly fine with Windows PC with sharp text and images. I have seen 1000s of people reporting the same issue and some unacceptable remedies to correct the issue such as Mini Diplay Port (Thunderbolt) to VGA adapter. Why the heck should I downgrade to get the correct resolution/sharpness when Apple can correct this issue with a software patch?

I called the tech support just now and they were acting like they never heard of this problem before, on pursuing the tech admitted that they are aware of the issue and said they have no honest solution to this problem yet.

I have tried every possible methods, thunderbolt to hdmi, hdmi to hdmi and hdmi to dvi. hdmi to dvi is better than all other options. Calibrated the monitor as well. So far no luck.

Prior to Mountain Lion I have used my MB Pro with mini dislay to DVI and had sharp text/images on the same monitor I am using now. With mountain lion my MB Pro also gives blurry text, so its is clear that Apple messed up big time with hdmi display in mountain lion. Glitches happens, but to admit and correct the issue is understandable, but here apple is playing nasty again! Shame on apple!

totally agree.

I've got the same problem with my mac mini i7 2.3 : sometimes i have a black screen and snow screen after.

One more time Apple send us products with native problems...

I have the same problem, purchased Nov 2012, mac mini (slower model) with or without the DVI adaptor.

Possibly helpful notes about our experiences with this issue(no fix yet):

• Except without the adaptor it streached the image once, we had to unplug and replug the screen for it to go away. The user didn't try simply turning the screen off and back on though.
• It does seem to do it less when we use direct HDMI instead of the HDMI to DVI adaptor+dvi cable combination.
• We have an intel 256GB SSD, we tried turning off screen savers and power saving options with no luck.
• We experience the problem at random while working or while the machine is idle.
• We cannot get the problem to repeat by performing any specific action.
• Currently the problem is occuring around once a day or just under.

yesterday I bought a mini display port to HDMI adapter. I plugged into the thunderbolt port and so far no display issues.

I still hope Apple will resolve this issue as I do want the thunderbolt port free for devices.

New Mac Mini i7 delivered yesterday. Same issue. HDMI connect with/without supplied adapter looks terrible on monitor. 3x snow or blank display and blanks out.

what is the cable part no that is working?

freaking apple....this was replacing an imac 24" that is less than 4 years old that had a manufacturer heat problem. I am ******.

So for the only better solution found by many users to use a thunderbolt to hdmi adapter. I haven't tried that yet, instead I bought a thunderbolt display itself. My problem is solved in an expensive way. Though I am happy because I got the best display and also I can use other thunderbolt accessories, additional 2 USB 2.0 ports etc. Though this will ruin the purpose of buying Mac mini for many users.

Wow, having read this thread, I feel "lucky" that I only suffer the fuzzy text issue on my new Mac Mini (interestingly, seems the same via HDMI and Thunderbolt, although others have reported more success via the latter - will be trying again myself when I get home).

Very disappointing first Mac experience for me so far!

I have the same problem. Had the 2012 Mac Mini for 1 week and the signal has been dropping out on the HDMI every 1 - 2 hours. Had it linked through my amp which showed complete loss of signal (sound and video) when the screen when off, used it on an LCD TV and projector. Same problem. Changed the HDMI cable and still no joy.

I've been on the phone to Apple support and they said they've not heard of this before and suggested that I reinstalled the OS to ensure the driver is running ok. I can't see this is likely as if the driver wasn't working, it wouldn't show anything and I'm not spending 6 hours setting it up again only to be dissapointed.

They've booked me an appointment to the Genius Bar but I feel they are going to talk around potential issues, offer to check it over which means some poor bugger has to watch it for 2 hours and wait for a 1 second blip and if they don't then it's fine.

Very awkward this. If anyone finds a fix, I'm all ears

I'll let you know if the Genius' find a solution

One suggestion I've seen in a few places is to use the Mini DisplayPort output of the Mac Mini with a Mini DisplayPort to HDMI adapter (and then with a HDMI cable)... but I can't say I've seen anyone saying "Yep, been running it for a few days and it has fixed it" yet. ncalliari was going to report back in this thread but hasn't yet 😟.

Has anyone suffering from the HDMI output issues tried a Mini DisplayPort to HDMI adapter? Did it fix your issues? And does the Mac Mini do audio output in its Mini DisplayPort, or would USB/Toslink be needed?

Apple stores sell a Mini DisplayPort to HDMI adapter for $34.95, so for anyone going to a Genius bar about the HDMI issue it might be worth trying to get them to give you one!

the point is that we are unable to use a dual monitor. The thunderbolt works fine, but if someone,like me, uses 2 lcds to split his job you'll understand it's impossible to work because one of the 2 screens becomes black like in standby mode

I am using for 2 days now & no issues. I got the adapter at Micro Center for $10.00.

I also have the random black screens issue on my 2012 Mini 2.6Ghz, Fusion Drive, 4GB. Currenly using HDMI output to Samsung P2770HD via the Apple HDMI to DVI adaptor.

Is there any more official way for me to report this?

Got a link for the adapter...anyone?

I see one on the apple store that has terrible reviews