.Bunny
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Q: Mac Mini (2012) HDMI losing sync (blank screen/snow)

Looks like my mini has the HDMI issue that others have reported on the macrumors forums as well as here.

 

Mine exhibits the blank screen/snow issue ONLY when the HDMI port is used.  This happens with HDMI->DVI adapter and also with pure HDMI cabling.

 

With the same screen, mini and DVI cable this does not occur.

 

This is a fresh Mini 2012 Server i7 model.

 

Do I need to report this in an official capacity somewhere (this is only the second ever apple hardware fault I've encountered in twenty years).  Should I just be patient for a possible fix (as I don't need the hdmi port

Mac mini, OS X Mountain Lion (10.8.2), 2012 Server i7 2.3GHz, SSD+HDD 16GB

Posted on Nov 8, 2012 1:24 PM

by .Bunny,Solvedanswer
.Bunny .Bunny
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A:

Well I can happily say that since the 1.7 update I have no blank screens or snow.  I have re-calibrated for both DVI and HDMI and now they match up and contrast/brightness are ok. 

 

For me at least this has cured all the display ills

 

 

 

(to recap my system is a 2012 Mini Server 2.3 with 16GB Crucial kit and running intel 240GB 520 series SSD with the second 1TB HDD). - happily running 10.8.2 with 1.7fw.

Posted on Dec 15, 2012 1:13 PM

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

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  • by Uygar Özdemir,

    Uygar Özdemir Uygar Özdemir Nov 8, 2014 2:52 AM in response to .Bunny
    Level 1 (0 points)
    Nov 8, 2014 2:52 AM in response to .Bunny

    I have the same problems with mac mini 2014.

    monitor - Asus mx279h

  • by jazzgtrl4,

    jazzgtrl4 jazzgtrl4 Nov 8, 2014 4:59 PM in response to .Bunny
    Level 1 (0 points)
    Nov 8, 2014 4:59 PM in response to .Bunny

    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

  • by weberflo,

    weberflo weberflo Dec 25, 2014 8:13 AM in response to .Bunny
    Level 1 (9 points)
    iPhone
    Dec 25, 2014 8:13 AM in response to .Bunny

    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.

  • by LapinoBEL,

    LapinoBEL LapinoBEL Jan 3, 2015 10:33 AM in response to weberflo
    Level 1 (0 points)
    Jan 3, 2015 10:33 AM in response to weberflo

    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.

  • by MacGallant,

    MacGallant MacGallant Jan 25, 2015 9:44 AM in response to weberflo
    Level 2 (322 points)
    Mac OS X
    Jan 25, 2015 9:44 AM in response to weberflo

    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.

  • by MohsinTS,

    MohsinTS MohsinTS Apr 21, 2015 11:32 PM in response to .Bunny
    Level 1 (8 points)
    iBooks
    Apr 21, 2015 11:32 PM in response to .Bunny

    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?

  • by davidthomasnelson,

    davidthomasnelson davidthomasnelson Apr 26, 2015 7:40 AM in response to .Bunny
    Level 1 (0 points)
    Apr 26, 2015 7:40 AM in response to .Bunny

    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.

  • by k161,

    k161 k161 Dec 17, 2015 10:04 PM in response to davidthomasnelson
    Level 1 (0 points)
    Dec 17, 2015 10:04 PM in response to davidthomasnelson

    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.

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