iMac 5K stopped detecting HDMI! Help!

Discussion in 'iMac' started by Bader, Jan 5, 2016.

  1. Bader macrumors newbie

    Joined:
    Nov 8, 2010
    #1
    Last night I had connected my HDTV's HDMI to my iMac 5K through MiniDisplay port, and it worked!

    Then I unplugged the HDMI to check something, and plugged it , but iMac couldn't detect it! I tried many times but it couldn't again (even in both ports)!

    However, I plugged it into my late 2008 MacBook and it has detected it!

    Is my iMac's thunderbolt has became suddenly defective, or something wrong went with MiniDisplay port?

    Thank you in advance :)
     
  2. MadDane macrumors 6502a

    Joined:
    Apr 5, 2015
    #2
    It may sound silly but have you tried restarting your machine?

    I am asking since it sounds very unlikely that both ports have stopped working at the same time so it could just be sure software glitch.
     
  3. Bader thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #3
    I understand your point!

    Yes, I did restart the machine and tried various solutions!
     
  4. MadDane macrumors 6502a

    Joined:
    Apr 5, 2015
    #4
    What else have you tried? That might help me and others get an idea of what it might be. Also, is both Thunderbolt ports recognized in the System Report?
     
  5. Bader thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #5
    I've only tried many simple restart and turn off solutions! I've just read about SMC and PRAM reset, I'll try them later after work!

    I don't think that the Thunderbolt port gone defective!
     
  6. Bader thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #6
    How could I double check the Thunderbolt ports in the System Report?
     
  7. Samuelsan2001 macrumors 603

    Joined:
    Oct 24, 2013
    #7
    Press D on startup and run a hardware test that should point out any obvious problems.
     
  8. MadDane macrumors 6502a

    Joined:
    Apr 5, 2015
    #8
    What Samuelsan2001 said is probably a better solution. But if you want to find it you go into About This Mac -> System Report and then in the left hand side there is a tab called Thunderbolt.
     
  9. Wayfarer macrumors 65816

    Wayfarer

    Joined:
    Jun 15, 2007
    #9
    Please keep us updated and let us know what happens!
     
  10. Bader thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #10
    I checked the System Information, it seems that the port is fine, a screen photo is attached!

    Keep in mind that the Mini Display port was unplugged during the report!
     

    Attached Files:

  11. Bader thread starter macrumors newbie

    Joined:
    Nov 8, 2010
    #11
    It worked!

    I conducted a PRAM reset and it worked!

    Thank you so much for your help guys :)
     

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