I am having a problem with getting both screens to work under windows 10. The same scenario worked perfect using Win 7. I performed a Windows update from 7 to 10. The notebook being used is a Dell Inspirion 3400 with 4gb of ram and 250gb of disk. The primary screen is the Dell notebook and the secondary screen is a Viso TV screen. The system will only boot to the secondary screen and the primary screen is black, it is acting link use the secondary screen only. I tried looking in the BIOS but could not find anything that might change the screens. I went to display properties and it looks like it does not see the primary screen. I disconnected the Viso screen but the primary screen still comes up black.
Anyone have an idea how to troubleshoot further or a solution would be greatly appreciated.