How can I get my Optiplex 990 to recognize the second display port. I bought the display port adapter for the HDMI to my second monitor and it still wont recognize it, and idea how i can get this up and running? I need both monitors for what im doing so this is really messing things up for me.
You can click the link below for information setting up multiple monitors.
Display port can be used only on a monitor with a display port connection. No converter cable can be used. See this in the link for connecting monitors Jessi posted. Try vga and hdmi. Not the best solution, but it should work.