Previous 1 2 Next 23 Replies Latest reply: Mar 26, 2013 2:39 AM by Wombert Go to original post
  • Wombert Level 1 (0 points)

    Try my solution, Pemberton_, that definitely fixes it. If you don't feel like fiddling around with an HDMI cable yourself, you can use but mind you that's just 25 cm with two plugs, so you'll need a separate HDMI extension cable as well.

  • Pemberton_ Level 1 (10 points)

    Yeah, I think I will, thanks. This is currently the adaptor I have now though so I'm not sure how exactly to get to the pin easily:®-Mini-Displayport-adapter/dp/B005J0XB7A/r ef=sr_1_1?ie=UTF8&qid=1364211277&sr=8-1


    I've just noticed that according to the HDMI 1.4 spec, that officially supports ARC - if I get an adaptor that supports 1.4 spec will it solve this? The one I have now is 1.3b, I think.


    Thanks for the (blazingly) quick reply!

  • Wombert Level 1 (0 points)

    In that case, removing the pin might be difficult, but you could try coating it with nail polish or something. I guess the easier way though is "ruining" a normal HDMI cable; it took me a little but I ultimately succeeded in removing the pin.


    Once again the reminder though, if you have a cable (male plug, not female receptacle) then the pinout ( is mirrored, so you'll want to remove the fourth pin from the right on the cable.


    It's a bit difficult even with small tweezers; what I ended up doing was, using a needle, removing the little "bridge" at the top that holds the end of the pin in place, bending the pin down, and then simply wiggling it left and right inside the connector a few dozen times until eventually, the metal broke at the far end inside the plug. Be careful not to ruin the other pins (they're quite durable though so don't hesitate to be a little bit brutal).

  • Pemberton_ Level 1 (10 points)

    Well, it took me an age to finally get that pin out but I managed it in the end.


    Given it a test and everything seems to be working greatly! Really appreciate your help Wombert, I hope other people in need manage to find this thread!

  • Wombert Level 1 (0 points)

    Glad to hear! Hope the original poster comes back at some point and marks the question as solved, that'd be helpful for others too.


    But now, enjoy your working HDMI connection

  • Sorking Level 1 (0 points)

    Wombert, this sounds like a terrific hack.


    I'm loathe to mark the question as solved, though. It's a brutal thing to damage equipment to get it to work - a hack not a full-blown fix. It's a flaw in what's been made and sold, rather than a missed option in a menu somewhere. This remains an issue Apple should be fixing at (what I imagine is) a software level.


    Still, as I say, terrific hack!

  • Wombert Level 1 (0 points)

    Yeah, I agree, they're somehow sending garbage commands over Thunderbolt and that causes the issues.


    I have, in the meantime, confirmed that it happens with other brand TVs too, and also when using a 15" Retina MBP, which still exhibits the issue. It might ultimately be a fundamental Thunderbolt incompatibility of some sort, but who knows...


    For those who'd rather not damage their cables, there is always although that, as I said, requires a separate HDMI extension cable (plus an mDP-HDMI adapter), so it's likely a lot more pricey than one or two AmazonBasics HDMI cables

  • rbilabronze Level 1 (0 points)

    Guys, thanks for the resolution on this. If I get the cable referenced in the post above would my proposed solution below work (or would I need additional cables)?


    I currently have an HDMI cable attached to my Tv. And also have the HDMI to thunderbolt adaptor. Could I purchase the cable mentioned in the above post and also a female to female HDMi connector and get it running.


    Basically my existing HDMI cable to the female adaptor, female adaptor to cable in post above, then cable in post above to HDMi to thunderbolt adaptor to MacBook Pro?



  • Wombert Level 1 (0 points)

    Yes, that should work just fine!

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