HDMI not working on rear left USB-C

Discussion in 'MacBook Pro' started by Samtb, Dec 24, 2016.

  1. Samtb, Dec 24, 2016
    Last edited: Dec 24, 2016

    Samtb macrumors 65816

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    #1
    is it normal that hdmi doesn't work on the rear left USB-c port on a 15 inch 2016 MacBook Pro? It works on the other 3 USB-c port. Power works on all 4 USB- c ports.
     
  2. idark77 macrumors 6502

    idark77

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    Dec 2, 2014
    #2
    Have you an adapter from USB-C to HDMI?
    Do it works in other ports?
    Do this port work with other adapters?

    However it is Not normal...
     
  3. Samtb thread starter macrumors 65816

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    #3
    Yes it works with the adapter on every other port. I've also noticed when I plug the adapter into that particular port, it messes up the wifi.
     
  4. idark77 macrumors 6502

    idark77

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    #4
    Did you try other adapters in this port?
    I suppose that the adapter is not made by Apple.
     
  5. Samtb thread starter macrumors 65816

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    #5
    It's not and I haven't. But if it works in every other port, surely it should work in this port regardless of it's an apple adapter or not?
     
  6. idark77 macrumors 6502

    idark77

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    #6
    I suppose that there is a RF intereference between the adapter and the WiFi card when attached to that port so it could not work properly...
     
  7. Samtb thread starter macrumors 65816

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    #7
    The wifi works most of the time though. But HDMI out never works on that port. So is that a problem with the port on the MacBook or is it the adapter?
     
  8. idark77 macrumors 6502

    idark77

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    #8
    The adapter is not compatible with your MBP in that port because there is an interference so I suggest to try another adapter in this port and verify that it works good. For example you can use an usb-c to usb 3.0 and connect a pendrive or Hdd to verify that the port is ok. After that you can buy a new usb-c to hdmi adapter because in my opinion your MBP is good.
     
  9. happyslayer macrumors 6502a

    happyslayer

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    #9
    It sounds like a port issue--which makes it a MacBook issue. Maybe it has a bad connection internally. Either use the other three ports and ignore that one (I'd put tape over it,) or take it in to an Apple Store. Also, if possible, try it with an Apple branded USB-c to HDMI dongle just in case.
     
  10. Samtb, Dec 24, 2016
    Last edited: Dec 24, 2016

    Samtb thread starter macrumors 65816

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    #10
    It's a multi adapter. And using the same adapter, all the input ports such as USB and sd card works. It's just HDMI out that doesn't. So could it be that there's an issue with the HDMI out in that port? Because I would have thought if it's wifi interfering, USB, SD card etc would also not work in that port.
    --- Post Merged, Dec 24, 2016 ---
    And also surely if it's the adapter, more people would complain? I just looked through the reviews and no one else mentions any problems with that one particular port on the MacBook Pro using this adapter.
     
  11. idark77 macrumors 6502

    idark77

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    #11
    Try another hdmi adapter to be sure or test the adapter with another MBP in an Apple Store.
     
  12. Samtb thread starter macrumors 65816

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    #12
    I can't justify putting tape over over it given the amount of money I paid for it. I also only got it last week which means most likely it's a manufacturing defect?
     
  13. happyslayer macrumors 6502a

    happyslayer

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    #13
    That's what I would think. I've seen Windows-based PC's and laptops with USB port issues (though not with USB-c since it's relatively new) but since the other three ports work correctly, it seems like the fourth is having some kind of issue. If possible, make a Genius Bar appointment. Do a TM backup first since they may just swap your laptop. Also, bring in the adapter, maybe it is testable on a machine in the store--though plugging into an HDMI monitor in store could be problematic.
     
  14. Samtb thread starter macrumors 65816

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    #14
    I don't think any stores have any stock of the new MacBook pros until mid January now though.
     
  15. Samtb thread starter macrumors 65816

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    #15
    Do you know if they will allow me to keep my old MacBook Pro until I can get a new one?
     
  16. Centsy macrumors regular

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    Feb 9, 2011
    #16
    Yes, they should place an order for one and you can hold onto your current MBP til it arrives.
     
  17. Samtb thread starter macrumors 65816

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    #17
    Oh. I guess I need to call to do that? Because I clicked return for replacement online and it says I need to return first.
     
  18. Samtb thread starter macrumors 65816

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    #18
    If it works with an apple branded one, does that mean the issue is the adapter? This adapter is a bit dodgy because when it's connected the wifi stops working.
     
  19. linguist macrumors member

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    #19
    just a thought , how about changing the HDMI cable and see if it works.
     
  20. Samtb thread starter macrumors 65816

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    #20
    Ok. But if it's the HDMI cable that's dodgy, surely it would have the same problem with all the ports and not just 1? I'm starting to think it could be the adapter because wifi stops working when the adapter is connected to any of the ports. So I'm going to try it with an Apple branded adapter. Then test the wifi in the 4 ports and the HDMI out in the 1 port.
     
  21. Samtb thread starter macrumors 65816

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    #21
    It works with an Apple adapter. Now I'm confused. This would suggest it's the third party adapter at fault. But then why on earth does it only not work on the rear left port? Is there something only in that port which interferes with HDMI out on the third party adapter?
     
  22. idark77 macrumors 6502

    idark77

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    Dec 2, 2014
    #22
    If it works with an Apple adapter your MBP is good. Let me say that the 4 TB3 are not internally the same so the adapter could interfere with the Wi-Fi when connected to that port. So It could be not fully compatible.
     
  23. Samtb thread starter macrumors 65816

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    #23
    I contacted Apple about it and they said they're happy to give me a replacement for peace of mind because they can't tell if it's the adapter causing the issue or if there's something wrong with that particular port.
     
  24. uptownnyc macrumors 6502

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    #24
    You're kidding, right?
     
  25. idark77 macrumors 6502

    idark77

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    #25
    Ok, I can understand that the Apple Customer Service has not idea about it but consider that the replacement could have more bugs than actual machine ( keyboard issue, power supply issue, scratch out of the box, screen uniformity, hissing noise...) but it is up to you.
     

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