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

80347 Views 429 Replies Latest reply: Jan 28, 2014 11:51 AM by jurre-j RSS
  • tmshk Calculating status...
    Currently Being Moderated
    Oct 1, 2013 10:18 AM (in response to .Bunny)

    Removing monitor configuration files worked for me. Now I have sound to my TV and monitor after putting my Mac Mini (Late 2012) to sleep.

     

    Just deleted these files:

    /Library/Preferences/com.apple.windowserver.plist

    and

    ~/Library/Preferences/ByHost/com.apple.windowserver.(something).plist

     

    Found from:

    http://superuser.com/questions/165108/misconfigured-external-monitor-on-mac-os-x -snow-leopard-10-6-3

  • Michael Graubart Level 2 Level 2 (250 points)

    Well, I took it to Apple and they fixed it overnight: replaced the RAM. Seems fine now, and I hope it stays fixed — that's the trouble with randomly occurring faults, one never knows whether they will resurface at some unpredictable moment

     

    So much for different monitor cables, ferrite rings adapters, etc.!

     

    Thanks, everybody, for help and advice, and I hope you will all in the end solve your similar (or dissimilar) problems, too.

  • Chris Syntichakis Level 1 Level 1 (0 points)

    Good news, the RAM was one of my initial suggestions, but I did not expect faulty modules, just the contacts of them.  As for me, the screen problems were eliminated, using an original Apple thunderbolt->DVI cable. 

  • Michael Graubart Level 2 Level 2 (250 points)

    Well, I am really glad you are out of trouble, as well. Thanks for your advice earlier on, too.

  • bobmepp Calculating status...

    Glad to hear that your problem is solved Michael. I have added my old VGA but very serviceable display as a second display, using a thunderbolt to VGA adapter cable. I was hesitant because I didn't want to start a problem, but everything is great-- the old display has never looked better and both monitors are rock steady.

  • Michael Graubart Level 2 Level 2 (250 points)
    Currently Being Moderated
    Oct 10, 2013 2:32 AM (in response to bobmepp)

    I'm glad your stuff is working well, too, Bobmepp. I have no need of two monitors and, in fact, barely have room for one on my desk, but it's good to know that two will work OK in case I ever need them.

  • KAKAMAMA Calculating status...

    I have the same problem with my late 2012 i7 mini, I usualy put the monitor to sleep after a peroid of time, when the monitor wakes up, I get the snow sometimes. It is very annoying, this is how I got around the issue.

     

    In the Display and Screen Saver perference under Screen Saver, set one of the four Hot Corners to Put Display to Sleep. When the snow comes up, just drag the mouse to the coner for a short time to put it to sleep then wake it up, the snow goes away.

     

    This is a work around. I am disappointed that Apple would release an imperfect product. I use Apple exclusively (I have an iMac, MBA and the Mac mini) because I like Apple's products for the most part. And I don't mind paying more for a good Apple computer rather than save a few bucks on a garbage Windows PC. But I expect less then perfection from Apple.

     

    Hopefully Apple will provide a fix for this.

  • Chris Syntichakis Level 1 Level 1 (0 points)

    I recently discovered, that if i turn-off then turn-on the monitor - quicky, I have the "snow" screen.

    I think the video output of the mac mini is "autosense" (to detect if the monitor is on/off) and loses the signal in this case or something like that.

  • antiseen Calculating status...
    Currently Being Moderated
    Jan 7, 2014 12:39 AM (in response to .Bunny)

    I have mac mini i7 and dell S2240L monitor , snow and blank screen was my problem too . I attached large ferrite cores which were supplied with my panasonic plasma tv to the monitor hdmi cable as close as possible to the connectors. Problem solved. We have a lot of equipment on one table , I think electromagnetic interference between the devices could cause snow .

  • jurre-j Calculating status...
    Currently Being Moderated
    Jan 28, 2014 11:51 AM (in response to antiseen)

    hello,

     

    I have same problems with snow/losing signal but I have mac mini middle 2011 ? Powered on mini, picture is OK and then before login window showed snow - sometimes is picture back itself after few seconds, sometimes I disconnect/connect HDMI, power off/on monitor unitil I see picture.

    I replaced HDMI cable and it is the same.

    I cannot try original DP-DVI cable, because I have only HDMI input on monitor and I don't have DVI-HDMI cable.

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