Skip navigation

Second Monitor Not Working

710 Views 8 Replies Latest reply: Jun 10, 2013 8:39 AM by Bob Sabiston RSS
NewLineProductionz Calculating status...
Currently Being Moderated
Dec 7, 2012 8:26 PM

Ive conected my second monitor (hp 2010i) to my 27'' iMac running OS X Mountain Lion 10.8.2 via a Mini-Display to VGA adaptor, it was working a few weeks ago, but it sudenly stopped working. The monitor is recognised by the OS. However, all I see is a black screen on the second monitor.

iMac, OS X Mountain Lion (10.8.2)
  • iVictorHugo Calculating status...
    Currently Being Moderated
    Dec 13, 2012 12:56 PM (in response to NewLineProductionz)

    I have exactly the same problem, my monitor is LG Full HD. Everything was just fine and suddenly stop working. It is not sending signal anymore.


    I contacted apple support, but they told me this could be related a hardware issue.


    I did all they possible workarounds I found here in forums and nothing worked, I restarted the PVRAM and all that stuff support told me to press on start. But the issue persist.


    Any ideas or what should we do?

  • LousyFool Level 4 Level 4 (2,640 points)
    Currently Being Moderated
    Dec 15, 2012 12:40 PM (in response to NewLineProductionz)

    As a friendly hint, b*tching or threatening does not impress anyone here, we are all users just like you.


    Why blame Apple immediately if something outside your Mac stops working? Of course, it can be hardware related: It can be the monitor itself, it can be the cable connection including adapter.

    It can be as simple as the monitor being set to the wrong input and waiting e.g. for an HDMI or so signal... you wouldn't be the first and will certainly not be the last having overlooked that. Guess what, it could be that its mains power plug is out of the wall...


    If you have checked everything regarding monitor and wiring, including trying it with the same cables and adapters on a different computer (even PC is okay), then please let us know again here.


    Thank you.

  • iVictorHugo Level 1 Level 1 (0 points)
    Currently Being Moderated
    Dec 17, 2012 12:51 PM (in response to LousyFool)

    I'm here from another computer and the monitor worked just fine.


    I'll go to apple store to see if they can take a look, deeply.


    I will share what I can find.



  • LousyFool Level 4 Level 4 (2,640 points)
    Currently Being Moderated
    Dec 17, 2012 11:08 PM (in response to iVictorHugo)

    Well done.


    Now good luck at the Genius Bar!

  • JackJinx Calculating status...
    Currently Being Moderated
    Apr 17, 2013 7:35 PM (in response to NewLineProductionz)

    I'm having the same problem. My monitor is a Dell and when I called them they said it was working fine. They've worked well together up until today, and now it starts up for a split second normally and then goes to a black screen. Who's going to save the day on this one?

  • meritas Level 1 Level 1 (0 points)
    Currently Being Moderated
    Apr 25, 2013 5:45 AM (in response to NewLineProductionz)

    Same problem:

    Mac mini using mdp for main monitor and hdmi to dvi cable for second monitor.  All working fine until recent "upgrade" in OSX. Hdmi port quit, doesn't show up in "settings".  I have tried all alterternatives including shut down monitor, shut down computer, change monitors, switching cables. etc.  No joy.


    I visit support and all I see is many people with the same problem but no solutions.  How does Apple support work?

  • Bob Sabiston Level 3 Level 3 (525 points)
    Currently Being Moderated
    Jun 10, 2013 8:39 AM (in response to meritas)

    Ugh this is happening to me now.  Is there no fix?


More Like This

  • Retrieving data ...

Bookmarked By (0)


  • This solved my question - 10 points
  • This helped me - 5 points
This site contains user submitted content, comments and opinions and is for informational purposes only. Apple disclaims any and all liability for the acts, omissions and conduct of any third parties in connection with or related to your use of the site. All postings and use of the content on this site are subject to the Apple Support Communities Terms of Use.