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

Its more than a year that I used the thunderbolt to DVI (DVI on my monitor) without any issues, because the (included with the mac mini) hdmi to DVI

caused all that sh*t. Well, after I upgraded (18-Oct) to Yosemite I use again the mac mini's hdmi to DVI without any issues so far.

I finally bit the bullet and upgraded to Yosemite.

The HDMI blanking problem was not resolved by the upgrade, but my monitor hibernation and screensaver have begun working again post upgrade.

I have the same problems with mac mini 2014.

monitor - Asus mx279h

Same issue here, 2014 mac mini i7 16g crucial memory,Kingston 240 SSD. Samsung SyncMaster P2770 monitor HDMI>HDMI...Recently just started having this issue just on start up and its very random, sometimes doesn't happen for days or more... I get the black screen then snow coming for a few seconds out of hibernation when it happens..any fix out there for this?? thanks

Same here, 2014 Mac Mini - Samsung Syncmaster P2450 connected with MDP->DVI adapter. Almost everytime after hibernation snow on the screen. I'm a loyal Apple customer, but this is not acceptable! Apple please fix that.

I have hdmi handshake issues now too using a Denon receiver connected to my Epson TW9200W (5030UB in USA) and Mac Mini. Using the same receiver on the Panasonic tv = fine, but when trying to send the signal to the projector, I get handshake issues. Other sources show no problem at all. This is with a Mac Mini dating from 2011.

Count me in too,

today on 1/25/15, after sleep, When i space space bar to wake up my Mac mini 2012 2.3 Ghz Quad Core i7, 16 GB RAM running Yosemite, the whole screen is colorful snow for 2 seconds and then my screen turns back to regular desktop. I am using dual Monitors but only the one using direct HDMI (Samsung) is affected.

This also happened on december 2014 before when i was logging out of my standard user and the monitor with direct HDMI (Samsung monitor) turned into colorful snow for 5 seconds.

Does this means my hardware or intel 4000 HD GPU is damaged?

Or is this a common problem with the Mac mini 2012 2.3 Ghz Quad i7 Model?

I am using a Samsung S27D360 27" LED Monitor via Direct HDMI which is erratically experiencing the colorful Snow Problems twice and an AOC 2436 24" LCD via mini display port to DVI which works fine.

So I'm experiencing the same problem. It just started a week ago; I think after the last update. Have had my 2012 Mac mini for about a year now - have higher versions of the firmware etc., but the screen will randomly go blank (showing "HDMI Input" alert on the screen), and then cut back in. Super-frustrating. Nothing in my setup changed across the last year, but the problem randomly started happening. I don't suppose anyone else is still in this boat?

I have a mac mini (late 2012) with two monitors. When I had the Asus PB278 connected via mini DisplayPort to DisplayPort adapter at 2560x1440 and the Samsung E1920 connected via HDMI to DVI at 1366x768, the Asus would periodically go black for a second. Sometimes a few times a day, sometimes a few times an hour. It was annoying. I read through the message boards and tried different cables, reinstalled OS X, called Apple support, etc. Finally, I connected the Asus via HDMI, which I was determined not to do since it drops the max resolution to 1080P and connected the Samsung via mini DP to DVI. It fixed the problem. Even though I'm not getting the maximum resolution from the Asus anymore, the 1080P actually looks better. The menus and icons are easier to read, photos and movies seem just as sharp, and the detail I needed for stock charts is there. Best of all, no more random blanking out of the screen.

I think I have a similar issue with my mid 2011 Mac Mini. maybe this information will help.

Mac Mini 2011 -> Yamaha RX-V677 -> Sony KDL-52EX

picture constantly blacks out (about 2 seconds) then comes back. No problems with audio.

This does not happen when connected directly to the TV.

The interesting thing is this also does not happen in the following situations:

Running in Bootcamp with Windows 7

Running in single user mode (command line only)

Things I've tried that has not helped:

changing hdmi cables

changing hdmi ports on the receiver

upgrading from 10.10 to 10.11 after I noticed it worked fine under Windows

perform smc reset

updating receiver firmware

removing com.apple.windowserver.plist files

setting ColorSync profiles in system preferences and ColorSync Utility

All this leads me to believe that there is some kind of bug in OS X itself. The hardware seems perfectly able to output a stable HDMI signal.

no solutions yet to this unwanted feature?

Mac Mini Late 2012, Thunderbolt to DisplayPort cable to external monitor a Philips 272S4L (2560x1440).

When Mac sets display into sleep mode, more often then not video signal won't be found by monitor.

replaced cable few days ago, ok for 2 days now same issue again. Can switch to HDMI and get video signal (1920), thank god for that, but have to reboot to get DisplayPort signal working again.

Have now set powersave to Never sleep. bah humbug