Whenever I plug in my HDMI cable my screens go blank.
I accidentally checked a secondary box to make my display primary on my extra monitor, but before that, I WAS supposed to change a refresh rate setting on the extra monitor so the picture would appear... but now, I'm stuck with a blank screen since I didn't do the above.
I'm using Windows 10 Bootcamp via a Macbook Pro, but surely that doesn't matter right? Isn't there a button on the keyboard to switch displays? (I don't see it on my Macbook at all - Mid 2015 version)
Or even better, is there a way to just reset all HDMI / video settings to start over for Windows 10?
please help.
Thanks.

I didn't find the right solution from the internet.
References: https://www.cnet.com/forums/discussions/screen-goes-blank-when-plugging-in-hdmi-cable/

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