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

If this does turn out to be an EDID issue, an HDMI Detective could be used to circumvent the issue. I had EDID issues with my 2010 Mac Mini and a Samsung TV and the guy linked below worked.

http://www.amazon.com/Gefen-EXT-HDMI-EDIDP-HDmi-Detective-Plus/dp/B001RIMZUW/ref =sr_1_1?ie=UTF8&qid=1355367424&sr=8-1&keywords=geffen+hdmi

Update from previous posts:

Unfortuneately I had to return my 2nd Mac Mini (late 2012) back to the Apple Store for full refund. I explain to them of the 1.7 EFI update made things worse. The guy at the Genius Bar was helpful and grabbed a few monitors from the back room and hooked up the mac mini. Of course, they all worked beautifully without the flickering and the red or green snow. However, that does not mean there is something wrong with my 24in Acer monitor. I am not buying a new monitor because this new EFI update "says so". I know there's a conflict between the Intel HD4000 and some of the model monitors for the HDMI/HDCP settings. I still believe that Apple will come up with a better and permanent fix down the road. When that happens, I'll be ready to buy the mac mini. I love the darn thing. Waiting at this time.

Good luck with yours!

P.S. I asked if they could revert back to EFI 1.5 and they said no.

Gr8Flyer7 wrote:

I asked if they could revert back to EFI 1.5 and they said no.

I'm surprised they didn't offer to give you a new mini that didn't have the update applied...

Fortunately the 1.7 update seems to have resolved my issue. 2 days without a problem. OS X 10.8.2

It's now been five days since the 1.7 update, and my mini hasn't displayed any video problems. There haven't been any new complaints from others for about the same time. Can we therefore deduce that the HDMI problem has been fixed, at least for most users?

HenryKisor wrote:

Can we therefore deduce that the HDMI problem has been fixed, at least for most users?

For most yes. The others have something else going on with their setup.

HenryKisor wrote:

It's now been five days since the 1.7 update, and my mini hasn't displayed any video problems. There haven't been any new complaints from others for about the same time. Can we therefore deduce that the HDMI problem has been fixed, at least for most users?

I applied the update right away (Usually I wait a month to hear what everyone else's experince is, but the video problems were driving me nuts). Anyhoo, no black screens or snowy flashes, no problem of any kind since I applied the firmware update. :-)

No, it hasn't. Before the update the flickering/Screen blank issue was so often - now after the 1.7 update its random. The fonts are fuzzy as well. The As per Apple's advice, I am returning the Mini.

I use Mini Oct 12, i5 with a Dell S2440L monitor, connected via HDMI. Using thunderbolt port might solve the issue, but as someone pointed out earlier, I don't want to lose my only thunderbolt for display.

The sad thing about the whole issue is I have bought a new Dell monitor just for the Mini and is stuck with it 😟. I can't believe these guys at Apple and Intel (If the problem is the HD4000 Card) can churn out a product without giving it a proper test!

for those who still encounters the crushed white issue, i suggest you to download the free Apps like:

• Brighter Screen Lite
• Shady

just adjust the brightness to around 85% and the issue could be temporarily resolved.

btw, it seems that after the 1.7 update, when I wake up the mac mini from a deep sleep, the crushed white issue gone. But when it wakes up from a normal/short sleep, the crushed white issue appears again.

good luck.

Update:

Apple has replaced my Mac Mini with another one - and guess what? It has the same issues....

Just thinking loud.... is this an HDMI Cable issue? I mean are we all using 1.4a or above?

You guys should know that Im getting the same issue while using the mini display port to DVI connection. I've tried hdmi-hdmi, hdmi-dvi and now thunderbolt - dvi. No difference in results. Problem seems to happen more when the processor and disk are under some strain. I've had the firmware update, which doesnt seem to have done anything. Dissappointed as this is my first Mac.

Anything else I should try? From reading other posts, I get the impression that swapping for a new mac mini doesn't solve the problem.

Jason

Very disappointed with my Late 2012 Mac Mini. Let me clearify, I'm disappointed that I'm having this monitor issue with the MAC. What the F****. Its's an Apple Cinima Display which cost a small forture, you would think since it is an Apple product it would play nice with other Apple products. Not the case. I'm running a dual monitor setup. Monitor #1 is the Cinima Display, Monitor #2 is an older Gateway. I contacted Apple support about the monitor freaking out all the time (going totally static gray and never coming back). They said it is a known issue and they do not have a fix. That was over a month ago. I finally got fed up and disconnect the Apple monitor and use only the Gateway. What is taking Apple so long to get out a fix? The last update mentioned in this thread did not fix the issue in my case. Note that I didn't have this problem my 2009 Mac Mini which ran flawlesly for years with dual monitors running Snow Leporard, Lion, and Mountain Lion. Come on Apple, get your act together. We spend way too much money on your products to have this much frustration.

* Late 2012 Mac Mini, 2.6 GHz Intel Core i7, 16GB Ram, OSX 10.8.2, 180GB SSD, 1TB HDD, 27" Apple Cinima Display, 24" Gateway Dispaly *

cv

Just thought I'd weigh in with my experience... my mom got a 2012 Mac Mini for Christmas, and when we hooked it up (via the supplied HDMI<->DVI-D connector) it mostly worked but the screen would turn to gray static, seemingly at random, around 5-10 times per day. Power cycling the monitor usually (but not always) cleared the fault.

As a work-around, she bought a MiniDisplayPort<->DVI adapter from Amazon (~$12) and connected using that instead (via the Thunderbolt port). The problem has not re-occurred since we did that (knock on wood!).

Of course that means we can't use the Thunderbolt port for anything else, but that's not a problem for now.

-Jeremy