MacBook Pro 14 Not connecting to external display via DisplayPort.

Help

As the title says, I have a brand new MacBook Pro 14. Literally only 3 weeks old. I have been connecting it to an external display for work (Samsung Odyssey G91SD) via a USB-C to DP 1.4 cable. I had no issues at all until last week when my MacBook went into sleep mode and I ‘woke it up’ and the secondary display never displayed anything ever again through DP.

I have tried using HDMI and can confirm that it works, the Mac detects the display and the display works just fine. I have also purchased a brand new USB-C to DP 1.4 cable and that hasn’t fixed the issue.

I cannot seem to get the MacBook to detect the display via DP at all no matter what I do. Resets, reboots, trying different USB ports, any and all troubleshooting I have found online.

Is there something wrong with my MacBook? Is there some technical issue I’m completely missing here? I am at my wits end!

Thanks in advanced for any help!

Posted Jul 29, 2025, 6:11 AM UTC

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