Monitor won't show screen

[Schnapspraline]

Hey Guys,
I wanted to connect my Macbook Air 2021 via HDMI to my 27xq Monitor but sadly it does not work. The Monitor looks like it is doing something (e.g. flashing light) but it never shows the Screen of the Macbook. Once in a while it says "No input signal found" but just for half a second and then its already gone. I did a factory reset on the monitor which didn't help. 
I found a similar question from another User for the Macbook Pro who's solution was to change the hub but this didn't work for me. The Problem should not be the Macbook or the adapter since I can connect them to any other Monitor/TV I have. 

I'd be glad if anyone could help me 🙂
Thanks in advance!

[Schnapspraline]

Its a MacBook Air 2020 M1 (not 2021) sorry

[Prométhée]

Hi

I'm not a Mac user, no idea.
but while waiting for another more accustomed to answer you, maybe ..
Can you try with a windows computer?
At least you might be able to tell if the screen is working

[Schnapspraline]

Hi, thanks for the reply. 
Yes it is working with a Windows pc. I’ve been using it for two years now without any problems but now I need to switch to the MacBook for work 😕

[JessikaV]

Hi @Schnapspraline ,

This issue could be related to a setting on your Mac.

Please, try to follow these instructions: https://support.apple.com/en-us/HT201177

Considering what you described, these instructions are probably the best for your case. If it does not work, we would suggest you to check on Apple Community, to see if they have any recommendation for you.

JessikaV
HP Support Community Administrator