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Question: Random Display Color Pattern on Shutdown

Hi.


This is a brand-new MacBook Pro with Touch Bar (more configuration details below). Suddenly, for no apparent reason, during shutdown and restart the display shows a random pattern of colors on a black background (see attached image).


User uploaded file


I have reset the NVRAM and the SMC as advised (or think I have -- not sure how to tell if they were successfully reset), but the problem persists. The pattern varies from shutdown to shutdown. I am running an external Dell monitor through an OWC Thunderbolt dock using a Thunderbolt-to-USB-C adapter. The color pattern appears on the MacBook Pro screen, not the Dell monitor, but the Dell monitor shows the cursor pointer for as long as it takes the computer to shut down. The problem may have begun around the time I started editing video with Adobe Premiere Pro, but I don't know if this is relevant or a coincidence.


Any help would be much appreciated.


Thanks,

Paul


Computer Hardware: MacBook Pro (15-inch, 2017); 2.8 GHz Intel Core i7; 16 GB 2133 MHz LPDDR3; Graphics: Radeon Pro 555 2 GB, EFI Driver Version 01.00.927 AND Intel HD Graphics 630 1536 MB, gMux version 4.0.29 [3.2.8].


OS 10.13.1 (High Sierra)


Peripheral Hardware: OWC Thunderbolt 2 dock (Thunderbolt 2 | USB 3.1 Gen 1 | FireWire 800 | HDMI | Gigabit Ethernet | Audio In & Out), with following devices:

DAS Keyboard 4 Professional for Mac

Dell U2412MB External Monitor

G-Technology 4TB G-DRIVE G1 USB 3.0 Hard Drive

MacBook Pro TouchBar and Touch ID, macOS High Sierra (10.13.1)

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Hello giraut.

Thanks for joining us at the Apple Support Communities. It looks like your MacBook Pro with Touch Bar is having video display issues. Definitely not something that is expected for a brand new Mac.

You've done the same troubleshooting I'd have suggested. At this point I would recommend that you Contact Apple Support for further assistance.

Best wishes.

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Nov 17, 2017 6:42 AM in response to giraut In response to giraut

Hello giraut.

Thanks for joining us at the Apple Support Communities. It looks like your MacBook Pro with Touch Bar is having video display issues. Definitely not something that is expected for a brand new Mac.

You've done the same troubleshooting I'd have suggested. At this point I would recommend that you Contact Apple Support for further assistance.

Best wishes.

Nov 17, 2017 6:42 AM

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Dec 13, 2017 11:24 AM in response to mbiddle-whoi In response to mbiddle-whoi

Well, I called Apple Support and we were on the phone for about 90 minutes. We did a number of things, so I'm not 100% sure what fixed the problem, but the problem is fixed, and I'm pretty sure it was connected to the dock through which I was running both my external display and an external hard drive. The computer seemed not to be able to handle these two peripherals being plugged in through the dock at the same time. I took the dock out of the equation and connected the drive and the display to different USB-C ports, and that seemed to solve the problem -- I haven't had it since. For what it's worth, I suggest getting on the phone with Apple Support and running through a bunch of troubleshooting moves, which are intended to narrow down where the problem originates. It was a slog going through them all, but the result was good. Good luck.

Dec 13, 2017 11:24 AM

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Question: Random Display Color Pattern on Shutdown