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Repair guides, disassembly, and troubleshooting information for the 14-inch MacBook Pro with the M4 family of chips, released in October 2024.

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Odd screen issues! With Hub connected external display

@danj Apologies, I managed to erase the post, and missed the comment. Lol, thanks for the response on the post I made, my original intent was to post here, not create a new one.

In response to your question. Funny enough, the problem occurs even on the mac internal display when connected to the hub, whichever hub, a kensigton and a lenovo one, with different monitors too. The screen stays black on all of them including the laptop one and only when I unplug and click on the power button it gets back , sometimes even having to restart the computer. But I can see some flickers of movement of the mouse and that the apps are running.

Original Response: I am having the same issue. Were you ever able to fix it? It just started on my MacBook Pro M4. It happens only on this Mac. I have tried two different hubs and monitors, and the same issue occurs. If I unplug the USB-C hub and touch the power button on the Mac, then the screen on the Mac comes up, and I can reconnect the hubs just fine.

I am making such a mess.

Answer this question I have this problem too

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For reference: Weird black screen behaviour when connecting MacBook Pro M1

This is a M4 MacBook Pro as such it is quite different than the older M1 the graphics and Thunderbolt services are very different!

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With the added information you are struggling with the different versions of Mac's USB-C port protocols! The Connector is not the protocols running down!

Think it this way... a pipe can carry water or gas, clearly we want the water to go to the sink and the gas to go to the stove! USB-C is technically the pipe here the protocols it supports then gets into what the device connected needs and in this case the Hub may not offer it passing thru!

Here's a detailed breakdown of your system: Apple MacBook Pro "M4" 10 CPU/10 GPU 14" Specs looking at the Ports section we can see the USB-C ports offer Thunderbolt 4 unlike the Apple MacBook Pro "Core i5" 1.4 13" 2020 2 TB 3 Specs which offers Thunderbolt 3. So while both will support in addition the baseline USB-C external drive file access and HDMI. The handshake to the display and what can be displayed on the internal concurrently is a bit of a mess just using a dedicated cable (no hub).

In your case you do have a HDMI 2.1 port as well. I would suggest using it for the external removing the USB-C mess all together.

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