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Connecting an external display

I have an Acer B226HQL monitor that I want to connect to my 2015 Pro running Monterey 12.6.1 using the HDMI port. When I make the connection, the Mac monitor flashes and then goes dark. Nothing on the Acer. I disconnect it and the display on the Mac returns.

I have followed instructions but nothing works. Any ideas on how I can make this connection to the external monitor work?

MacBook Pro

Posted on Nov 9, 2022 12:45 PM

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Posted on Nov 14, 2022 3:06 PM

<< as soon as I plug in the HDMI (whether or not it's connected to the monitor), the Mac screen flickers and goes dark. >>


That cable sounds defective.


to get a Mac display to be come active, the Mac sends a query to the external display, which answers with its name and capabilities before it is "recognized" as connected.

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Question marked as Best reply

Nov 14, 2022 3:06 PM in response to Angelb63

<< as soon as I plug in the HDMI (whether or not it's connected to the monitor), the Mac screen flickers and goes dark. >>


That cable sounds defective.


to get a Mac display to be come active, the Mac sends a query to the external display, which answers with its name and capabilities before it is "recognized" as connected.

Connecting an external display

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