My monitor keeps going into Power Saving Mode when connected to my 16" Macbook Pro via USB-C

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My monitor keeps going into Power Saving Mode when connected to my 16" Macbook Pro via USB-C

Hi all, I have 16" Macbook Pro base model with the AMD Radeon Pro 5300M and a 4k 32" monitor. I tried connecting them with a HDMI and USB-C cable. When I use a HDMI cable and an adapter, the monitor turns on but some parts of the screen flickers with white and red dots and there's lag when moving my mouse around on the monitor. When I try it with a USB-C cable, the screen stays on for about 10 seconds then it would go into power saving mode. When I try changing settings such as screen resolution or mirroring option, the monitor would turn on and works for a few seconds before going back into power saving mode. I have tried turning on and off the Automatic graphic switching but nothing changes.

MacBook Pro 16″, macOS 10.15

Posted on Jul 10, 2020 6:27 PM

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Answer 1

Jul 11, 2020 6:27 AM in response to tirapat290

If it's not the computer and it's not the display, that only leaves the "Lowest Bidder" cable they packed in the box.

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Answer 2

tirapat290 Author

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Jul 10, 2020 6:43 PM in response to Grant Bennet-Alder

The monitor is a JN32A, the USB-C comes with the monitor

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Answer 3

tirapat290 Author

Level 1

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Jul 11, 2020 3:10 AM in response to Grant Bennet-Alder

I just finished erasing my HD and reinstalled Mac OS Catalina, the result is the same.

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Answer 4

Jul 10, 2020 7:27 PM in response to Grant Bennet-Alder

Does it behave any differently in Safe Mode?

Screen updates in Safe Mode will be wonky and slow, but ultimately correct.

Safe Mode takes defaults for everything it can, including screen resolution. But any changes you make in safe mode will "stick" in regular mode.

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Answer 5

tirapat290 Author

Level 1

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Jul 10, 2020 7:38 PM in response to Grant Bennet-Alder

Hi Grant, thank you for you replies, I don't think the monitor has issues, I tried it with a Dell 11" Lattitude and a 13" Macbook Pro and it worked fine.

It also works normally with the USB-C in Safe Mode.

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Answer 6

Jul 10, 2020 7:44 PM in response to tirapat290

Safe Mode gives you the opportunity to use a default resolution, then change to a resolution you like and it will "stick" in regular mode. This can allow you to get the resolution under control again if you have set a resolution that is slightly too high or out-of-range.

Otherwise, works in Safe Mode but not in regular Mode generally says, "It's something you added".

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Answer 7

Jul 10, 2020 6:38 PM in response to tirapat290

What display?

where did you get the "USB" cable are you using ?

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Answer 8

Jul 10, 2020 6:58 PM in response to tirapat290

That display does not seem to be operating correctly. You should discuss these issues with the seller.

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My monitor keeps going into Power Saving Mode when connected to my 16" Macbook Pro via USB-C

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