I had the same problem when using another HDMI cable
I couldn't change the external monitor to a lower resolution because it kept flickering and going to the menu for the external monitor, it would just reset and send me to the settings for the built-in monitor
I had the same problem when using another HDMI cable
I couldn't change the external monitor to a lower resolution because it kept flickering and going to the menu for the external monitor, it would just reset and send me to the settings for the built-in monitor
I attached a video