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Monitor showing 'Input signal not found'

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 I just bought an HP monitor as a second monitor to connect to my surface pro laptop. I connected the monitor with a switch control using a VGA cable. I get an error Input signal not found Check the video cable and cable source.  My laptop does not recognize the monitor either. When I go to input on the screens menu it shows VGA selected which is correct but the screen is blank.

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It is not clear as to the "surface pro laptop" version, so please describe that host in more detail.

Also please explain in more detail " I connected the monitor with a switch control using a VGA cable."  If the Surface does not have a VGA output but HDMI, the the adapter must be an active adapter.  Just an FYI

I'm not an HP employee.
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