horizontal flickering lines MBP late 2015

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Level 1

9 points

horizontal flickering lines MBP late 2015

Hi,

I've recently noticed a problem with my Thunderbolt Display,

When I work with my MBP 13" with the lid open everything is working fine, but when I close the lid I'm starting to see flickering horizontal lines (black and white lines).

I'm running Mac OS Sierra and the latest Thunderbolt Display firmware.

I've also tried to switch to a different ThunderPort but it did not help.

Does any one know what can I do about this situation ?

I've uploaded a youtube video to demonstrate : https://youtu.be/euATR7hWG_g

MacBook Pro with Retina display, OS X Mavericks (10.9.1)

Posted on Apr 17, 2017 1:46 AM

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Answer 1

omryno1 Author

Level 1

9 points

Apr 29, 2017 4:50 AM in response to chuck_3rd

Hey Alex,

First of all, thank you for your response,

I've gone over the links and I did every thing that seems relevant to my situation, but none of theme really helped.

I've tried to :

perform an SMC reset.
perform an NVRAM reset.
I've disconnected my ThunderBolt Display from every thing including the AC.
I've tried to switch to another ThunderBolt ports on my Mac.
and I even completely reinstalled macOS, just in case that was an software problem.

and after all of this, I'm still seeing flickering white lines on my ThunderBolt Display while the MacBook lid is closed.

the funny thing is the line appears only where there is a high frame rate, like in this picture I've added of a 4K video on YouTube

Can it be a hardware problem on my Mac or my ThunderBolt Display ?

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Answer 2

chuck_3rd

Community Specialist

Apr 29, 2017 4:30 AM in response to omryno1

Hey omryno1,

If I understand correctly, you are seeing flickering lines on your external display when you use closed-display mode with your MacBook Pro. I would recommend you read this article and use it to help troubleshoot the issue. I would recommend you read these articles and use them to help troubleshoot the issue.

Get help with video issues on external displays connected to your Mac
Use your Mac notebook computer in closed-display mode with an external display
Thank you for using Apple Support Communities. Have a good one.

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Answer 3

raina_b22

Community Specialist

Apr 30, 2017 10:19 AM in response to omryno1

Hello omryon1,

Thanks for keeping us updated. Based on the flickering lines appearing when connected to an external display and the lines are still appearing after you followed the steps in the articles, the next step to try and get this resolved would be to contact Apple Support directly.

If you've tried these steps and your display still isn't working, contact Apple Support to get more help.

Get help with video issues on external displays connected to your Mac

Take care.

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Answer 4

May 15, 2017 7:14 AM in response to omryno1

Hello, I have the exact same issue with the same Macbook. Everything works fine when I have the lid open but it starts flickering when I close. I really hope there will be a solution to this.

I will post if I can find a solution and I hope you will too!

Regards, Edvin

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Answer 5

omryno1 Author

Level 1

9 points

May 16, 2017 8:18 AM in response to Edvin Forsgren

Hey Edvin,

First of all thank you for your reply and interest, The update that Apple just released (macOS 10.12.5) fixed this issue for me too, I'm so glad it was a software problem.

Thanks again,

Omry.

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Answer 6

May 15, 2017 1:22 PM in response to omryno1

Hello once again, today there was an OS update released and it seems like it has fixed the issue! At least for me it seems like it. Hopefully it will fix your problem too

Regards, Edvin

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