LG display shows NO SIGNAL when connected with MacBook Air

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404John Author

Level 1

4 points

LG display shows NO SIGNAL when connected with MacBook Air

The combo worked perfectly for years, all of a sudden the LG display shows NO SIGNAL.

The LG display still delivers electricity to the MacBook Air.
The display even shows USB C in the input list.

In System Settings -> Displays -> Option Key -> Detect Displays no displays (except for the built-in) are found.

I found an old thread from 2022, looks like the issue has not been solved. Any ideas?

Thank you very much!

MacBook Air 13″, macOS 14.4

Posted on Apr 10, 2024 2:11 AM

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Answer 1

Top-ranking reply

WheelieNick

Level 8

45,863 points

Apr 10, 2024 2:29 AM in response to 404John

How is the display connected? With an usb c cable or via a dock? If it is connected via a dock you want to try it via a cable instead

Also, if you're on macOS Sonoma make sure that you update until the latest version, in version 14.4 where some slight problems with docks and displays, so make sure that you're on 14.4.1

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Answer 2

404John Author

Level 1

4 points

Apr 10, 2024 5:55 AM in response to WheelieNick

Thanks! It´s a USB C cable (I bought it new yesterday to make sure it´ s not the cable), and it definitely works as the display wakes up when connected, there is electricity via the USB C cable - but still no signal and no display detected.

I updated this morning and I´m on 14.4.1..

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LG display shows NO SIGNAL when connected with MacBook Air

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