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HP Envy 34-A010
Microsoft Windows 10 (64-bit)

I'm trying to connect my wife's work laptop, which is a Dell, to our HP AIO HDMI-IN port and it does not detect a source at this port. Her laptop has a USB-C to HDMI out connection, which works fine with monitors and TVs. The HP AIO also detects a Roku and Fire stick in the HDMI-IN port, but for some reason it doesn't detect the laptop. Is there extra hardware required?

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