Mini Display port stopped working!?

Discussion in 'MacBook Pro' started by rawdawg, Aug 8, 2010.

  1. rawdawg macrumors 6502

    Joined:
    Jan 7, 2009
    Location:
    Brooklyn
    #1
    I have a year old 17" MBP. I use it with a 24" Dell and have had no problems. Occasionally I hook it up to my HDTV with a long HDMI cable and a DVI to HDMI adapter.

    Tonight I wanted to watch something so I unplugged the Dell and plugged in the TV, but nothing happened. I noticed on my MBP everything was on the one screen as if dual display was not working. I unplugged the mini display port, screen goes blue for a sec, and the same screen comes back up. Plug it back in, screen goes blue for a sec, and the same screen comes up. Repeat, same results. The Dell when unplugged says "no dvi signal" but plugged in is black.

    Restarted 3 times, repaired permissions.... nothing.

    Has anyone else encountered this?
     
  2. allforpiratebay macrumors member

    Joined:
    May 17, 2008
    #2
    Yeah,
    I had gfxCardStatus installed and it was set on integrated - i encountered a similar situation. MBP only use discrete card to output.
    Mite not be the case though.
     
  3. acribb macrumors regular

    Joined:
    Nov 30, 2007
    #3
    Had the same issue on mine. Resetting the PRAM and NVRAM fixed it.
     
  4. circularforward macrumors 6502

    Joined:
    Jul 18, 2010
    #4
    Have you checked to see if your mdp-to-dvi adapter is ok? I had my mdp-to-dvi adapter go out on me and had it replaced by Apple.
     
  5. rawdawg thread starter macrumors 6502

    Joined:
    Jan 7, 2009
    Location:
    Brooklyn
    #5
    reset PRAM, didn't work.

    Went to Apple Store, turned out my adpater (MiniDisplay to DVI) cable died.

    The genius told me be careful with HDMI TV's as since they carry a current (when using a HDMI to DVI adapter) they can blow your adapter.

    They replaced it and it's working fine now!
     
  6. circularforward macrumors 6502

    Joined:
    Jul 18, 2010
    #6
    Hmm, that's good to know. Also, when I had my problem, I looked online, and it seemed quite a few had their adapters die on them. It doesn't seem to be an uncommon problem.
     
  7. DanMacApple macrumors 6502

    Joined:
    Jul 1, 2010
    #7
    I use a direct mini display port to HDMI adapter with no problems, you might want to try out one of those adapters.
     

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