All laptops unless they specify 3 monitor support are dual display capable. The LCD in the laptop is one and the external is number two.
To get a third display I add some USB display card.
I am trying to set up my laptop to use two (2) external monitors. I am using a Dell Latitude E6420 laptop that has an external VGA connection as well as an HDMI connection. Currently I am able to use the laptop LCD screen as one display and an external monitor connected to the external VGA connection on the laptop. I would like to, if possible, connect a second external monitor to the HDMI connection. The monitor I have has an HDMI connection on it and when I connect it to the laptop, I am unable to get it to work on the 3rd (HDMI connection) monitor yet it will output to the laptop LCD and the external VGA connected monitor.
Is there a way to get it to output to the HDMi connected monitor as well? Do I need third party software to accomplish that? The laptop is running Windows 7 Enterprise 64 bit. It is on a company domain but access is not a problem (I have domain administrator access if necessary).