rMBP '15 mid 2014 - dark display in clamshell mode

Question

rMBP '15 mid 2014 - dark display in clamshell mode

Hi all

I have rMBP '15 mid 2014 connected to BenQ UHD BL2711U monitor via DispPlay Port 1.2. High Sierra installed.

All works well while the MacBook is open. As soon as I close the lid, the external display goes dark (not to sleep). I can put it to sleep via keyboard shortcut. But when I wake it up, the display goes back to dark dimmed state. The power is connected to the MBP and wireless keyboard and mouse all function.. MacBook is not outputting to the external display in 'closed lid' mode. Any thoughts?

thanks

MacBook Pro with Retina display, macOS High Sierra (10.13.3)

Posted on Mar 16, 2018 11:28 PM

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Answer 1

CarlAVII

Community Specialist

Mar 19, 2018 6:05 PM in response to dmitryfromparkdale

Hey there, Dmitry!

Thanks for bringing your MacBook Pro external display issue to the Apple Support Communities. If I understand, you are unable to use the computer in closed-display mode with the external display. Instead, when you close the computer the external display goes dark. I'd be happy to help!

First, make sure you're following the steps outlined in Use your Mac notebook computer in closed-display mode with an external display - Apple Support to get closed-display mode set up.

Once you confirm you're set up properly, I would recommend using the steps under the "If the display image is blank or unusable" section of Get help with video issues on external displays connected to your Mac - Apple Support if the issue persists.

Cheers!

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Answer 2

Mar 19, 2018 9:19 PM in response to CarlAVII

Hi Allen

I've gone through these steps already. The issue is not in MacBook not detecting the external display. The issue is in display going dark when I close the lid. It doesn't go to sleep, but just sits in-between sleep and working state.

I've reset NVRAM and SMC but that hasn't worked.

Any other ideas?

thanks

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Answer 3

rose_10

Community Specialist

Mar 20, 2018 11:48 AM in response to dmitryfromparkdale

Hi, Dmitry,

Thanks for the update. Since you've gone through the steps outlined in the previously provided article and are still having some trouble, I would recommend that you reach out to Apple Support directly for further assistance next. You can do that here: Contact Apple Support .

Have a lovely day.

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rMBP '15 mid 2014 - dark display in clamshell mode

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