usb-c video out stopped working / cant connect to external displays

Question

usb-c video out stopped working / cant connect to external displays

Both external monitors stopped receiving video from IMAC. Tried all the basics plug /unplug - restart - option/connect display to no avail.

Ventura 13.2.1

IMAC retina 5K 2019

Posted on Mar 21, 2023 5:20 AM

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Answer 1

Top-ranking reply

brianinmaryland Author

Level 1

14 points

Mar 22, 2023 10:50 AM in response to Drew_7

Thanks for you input.

I ran the Diagnostic (hold down "D" on start up) and there were no errors reported.

What ultimately fixed the problem and what I learned should have been the first course of action was a full power cycle:

Disconnect all cables from IMAC.

Disconnect power cable from IMAC

Wait 15 Seconds minimum

Reconnect Power cable

Reconnent ethernet

Restart

Reconnect monitor cables.

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Answer 2

Drew_7

Community Specialist

Mar 22, 2023 10:46 AM in response to brianinmaryland

Hello brianinmaryland,

Based on what you've shared and the steps you've taken there may be an issue with your Mac hardware. With an Intel based Mac you may find help in resolving display issues by taking the guidance listed here: Reset NVRAM on your Mac - Apple Support

NVRAM (or PRAM) is a small amount of memory that your Mac uses to store and quickly access certain system settings such as sound volume, display resolution, startup-disk selection, and time zone. These settings vary by Mac and the devices you're using with it.

Regards.

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Answer 3

hc1111

Community Specialist

Mar 22, 2023 12:29 PM in response to brianinmaryland

Thanks for the reply, brianinmaryland.

We're glad to hear those steps resolved the issue.

We hope you have a great week.

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usb-c video out stopped working / cant connect to external displays

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