Thunderbolt to Display Port Cable Not Working

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Thunderbolt to Display Port Cable Not Working

I recently bought a mac Mini M2 Pro and connected it to my Dell U2422H 24" monitor with an HDMI cable and it worked fine. But I wanted to connect it with a Thunderbolt to Display Port cable since I know the picture can be a little better.

Anyway I bought a Benefei USB-C to Display Port cable and connected it up and when I turn both the Mac and Monitor on it says no DP cable…

Is this just a compatibility issue or am I missing something else?

Mac mini (M2 Pro, 2023)

Posted on Apr 19, 2023 11:24 AM

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Answer 1

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GazzaMataz Author

Level 1

16 points

Apr 26, 2023 03:54 AM in response to den.thed

Hi Den

I have fixed the problem I had with the DD & PM software! It wasn't working since I didn't have the USB-C to USB-A plugged in from the monitor to the Mac mini - doh! I wondered why it kept asking me to plug something in - should have read the manual in more detail. Slightly annoying thing about this is that I loose a USB-A port on my Mac mini.

Still have yet to test the DP to Thunderbolt cable on a different system. I do have another Dell monitor on my PC so I will try that at some stage.

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Answer 2

den.thed

Level 10

88,792 points

Apr 26, 2023 05:40 AM in response to GazzaMataz

Thanks for sharing what fixed the issue, it is good info for others using Dell displays.

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Answer 3

den.thed

Level 10

88,792 points

Apr 19, 2023 12:36 PM in response to GazzaMataz

Do you have the Dell Display and Peripheral Manager?

see > https://www.dell.com/support/home/en-us/product-support/product/dell-u2422h-monitor/drivers

Is the Dell display set to DisplayPort input using the on-screen menu?

download or view the Dell Display and Peripheral Manager on Mac User's Guide,

at > https://www.dell.com/support/home/en-us/product-support/product/dell-u2422h-monitor/docs

If those do not help, try a high quality 8k USB-C to DisplayPort cable.

for example > https://www.amazon.com/dp/B09M3BFHPP/ref=sspa_dk_detail_1?

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Answer 4

GazzaMataz Author

Level 1

16 points

Apr 20, 2023 08:38 AM in response to den.thed

Thanks for the info Den - much appreciated. I installed the software and have read the manual but it still don't work. Also I have noticed that the Dell Display & Peripheral Manager on the Mac doesn't allow me to alter any settings other than Easy Arrange…

I shall have to delve further…

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Answer 5

den.thed

Level 10

88,792 points

Apr 20, 2023 09:06 AM in response to GazzaMataz

You're welcome.

You could have gotten a bad USB-C to DisplayPort cable. Test the Benefei USB-C to DisplayPort cable in some different ports and/or test the cable and display connected to a different Mac if possible.

If that doesn't help, then I would try a higher quality 8k USB-C to DisplayPort cable.

The other option, is to test a short premium certified HDMI cable to see if that produces better results than the HDMI cable that you currently have.

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Answer 6

GazzaMataz Author

Level 1

16 points

Apr 26, 2023 07:00 AM in response to den.thed

That's what I thought too Den. I might try the DP cable again to see if plugging the USB cable in helps with that. I will keep you all posted.

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Thunderbolt to Display Port Cable Not Working

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