Hello San21a,
Could you please clarify one thing for me? You wrote that both screens are getting black when the dock is plugged in. Does it mean that if you are using only Macbook screen and attach the dock with an external screen the Macbook display stays also black? If so, what will happen if you restart the Macbook with a docking station + external screen plugged in?
Did you checked the source on the monitor? Is it correctly set to the correct cable type?
Thank you for your feedback.
Best regards,
Jakub
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