Question External monitor screen flickering when connected to my laptop

[Pete T]

Hi,
I have this annoying issue and hope you can help me out.
My external monitor screen starts flickering when connected to my laptop. After connecting it works fine for about 10 seconds then it starts flickering.
The laptop screen also turns on / off.
And like after 1-2 minutes the external monitor gets disconnected and the laptop display driver gets disabled.
I reinstalled different versions for display driver but not working. I also reinstalled Windows.
Monitor works just fine when connected to PC (by using the same HDMI cable). So I guess no problem there.
Graphic card: Nvidia GeForce GTX 1060.

I have created a video. Please check the link below.

WhatsApp Video 2023-05-08 at 22.38.35

Watch "WhatsApp Video 2023-05-08 at 22.38.35" on Streamable.

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Video

Thanks for reading.

 

[Pete T]

Hi guys,
I connected the laptop to a wireless display and it works just fine.
What does this mean?
Could this be a problem of the HDMI port?