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LG Ultrafine 4k monitor

I just bought a new LG Ultrafine 4k monitor for my MacBook. Yesterday was working fine. Today, when I try to use my display again, it just shows black screen, it does charge my Macbook but doesn´t show anything on display anymore. I tried to connect my laptop to another display in the office (exact same model) and it does work and connect automatically when cable is plugged in. I even tried with the second monitor cable, restrated the computer etc etc nothing is helping.


Please can someone help me with this problem?

Posted on Feb 4, 2022 9:58 AM

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9 replies

Feb 4, 2022 10:55 AM in response to Cuerna05

to get a Mac display to become active, you need the Mac to query the display, and the display to answer with its name and capabilities. Otherwise, the display will not be shown as present, and no data will be sent to the display. "No signal detected" is generated by the DISPLAY, not by the Mac.

 

This query is only sent at certain times:

• at startup

• at wake from sleep — so momentarily sleeping and waking your Mac may work

• at insertion of the Mac-end of the display-cable, provided everything on that cable is ready-to-go

• on invoking Option-(Detect Display) button in Displays preferences (from another display)

 

so try doing some of those things and see if the display comes alive.

Feb 4, 2022 11:48 AM in response to Grant Bennet-Alder

Tried all the above. None of them worked. I already installed the LG on screen App and says there's no monitor connected. As we bought two monitors in the office i was able to try with another exact same model monitor and it works. Everything works with the second monitor so I'm wondering if it worked for one day and stop working through the night?

LG Ultrafine 4k monitor

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