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

I can't believe there are so may comments about this issue and mac didn't to anything yet. I have the same problem. 2 samsung monitors 24" each, one AMB2330 and the other S24E310. No matter which one is connected though MDP, the one connected through HDMI always fails. I can only get it to work is by leaving both monitors connected and on all night with the mini powered off. In the morning I power on the mini and both monitors work, but after 20 minutes the one on HDMI goes black and it never comes back.

I have a Mac Mini (late 2012) connected via HDMI to a relatively low res 32in TV/monitor (1360x768).

Still running OS X, El Capitan, 10.11.6

I found it really annoying when it would lose display after going to sleep especially overnight.

I didn't know of any fixes other than rebooting, and pretty much resigned myself to the unresolved issue.

Then one day, I came across another site with similar issues and all the user did was restart the monitor!

Could it be that simple? For me the answer was YES! Just power the monitor off/on and the entire display comes back beautifully. I still run into the snowy loss of display now and then and it is no longer an issue for me.

Hope this helps someone...

Anton

Unfortunately, power the screen on and off does not work for me. If the computer goes to sleep the screen goes to 'no signal' mode, which is fine. If I press the shift key or click the mouse to wake it up, the screen comes back . . . sometimes. Sometimes, it flashes on and then goes back to no signal. Sometimes I have to do lots of random stuff on the KB and Mouse and it will come back. Most usually I now have to power off the machine - which is really annoying.

Same problem with me.....I got my mini on 11/01/12 & I bought a new ViewSonic monitor. The screen will go blank & than all to snow. I turn the monitor off & than on and everything is back to normal. I can never anticipate when it will happen. Some days it only happens one time.

I reported to tech support today, however no answer as to the problem or fix. They want me to send them capture data so their tech gurus can analyse.

The more posts that I read I am convinced it is not my monitor.

same problem here: i got random black screens and snowing screens while using the hdmi port, both with adapter or lcd tv connected with the hdmi cable.

how to fix it?

Contact Apple support...the more people reporting this issue will hopefully find a fix. The tech person I spoke with has requested a capture of my computer so they can view what is going on.

Same here. I have HDMI handshake problems with a Mac Mini 2012 and Epson 5020UBe projector.

My old Mac Mini 2010 worked fine! There are definitely HDMI problems with this new 2012 Mac Mini.

Disappointing that with each Mac Mini release we have to wait for Apple to issue a firmware fix for HDMI issues which should have been identified before shipping. This is not the first time a Mac Mini has showstopper HDMI problems on release.

Wondering if anyone else besides .Bunny has tried using a

Mini DisplayPort to DVI Cable on their new mac mini. If that is viable, I will pick one up & see what happens.

Well darn it anyways. I have problems too with the HDMI screen going blank, then popping up again.

I'm also having a problem with the HDMI monitor not being sharp and coloured correctly. Here's what I wrote in a separate thread:

"I've purchased a brand new late 2012 Mac Mini with 1T fusion drive, upgraded processor and 4 GB of Ram.

I'm running two 23.6 inch Samsung S24B300 monitors: one through the Thunderbolt port with a HDMI convertor and the other through the HDMI output.

The monitor running through the Thunderbolt port looks good, with sharp text and excellent colours.

The monitor running through the HDMI port looks washed out and the text is a bit fuzzy.

Yes, I've changed around the monitors and the cables etc. The results are the same and the culprit is the Mac Mini, not the monitors or the cables.

Is this normal?

Is anyone else running two monitors in this setup?

Could upgrading the RAM assist?

Thanks!"

Same here also - new 2012 Mac Mini with a Samsung 27 inch monitor via HDMI - drops display for a few seconds before recovering - ever 1-2 hours or so.

So far I have sent a monitor back to Amazon (sorry Amazon) and also replaced a new HDMI cable, with no resolution. Seems like it is the Mac to me.

Am trying a MiniDP to HDMI adapter tonight and will let you all know the outcome.

http://www.amazon.com/Kanex-iAdapt-MDPHDMIV2-HDMI-DisplayPort/dp/B0041NFIBS/ref= sr_1_4?ie=UTF8&qid=1352495302&sr=8-4&keywords=mini+dp+to+hdmi

If you use two displays like I do, one for a projector and another for a monitor, you could try using the MiniDP adapter shown above for the HDMI output and use the bundled HDMI to DVI connector as DVI out to the monitor, essentially reversing them.

Am hoping this will work in the interim until Apple fix this nasty HDMI implementation.

Hello. Wow, so display issues are not new to the Mac Mini? Approximately how long did it take for them to acknowledge the issue and to release firmware fixes in the past?

well, i don't think a firmaware could fix this. I think it's an hardware issue and they should change something on the videocard/motherboard to fix it. Of course if a firmware could fix it i would be the happiest man in the world since i'm becoming insane with all this screen blinking!

i had the mac mini 2011 and i used the same connectors, thunderbolt and hdmi, they always worked fine on mac mini 2011. Now i moved to mac mini 2012 with the same adapters and connectors: now i have these random back screens and snowing screens