I have a Dell XPS 13 (2016) with a Dell USB-C adapter. It will not detect my NEC LCD external monitor. I have tried a Dell USB-C adapter and a D-SUB cable to the monitor. I have also tried a Monoprice USB-C adapter with a Monoprice HDMI cable. Neither work. The monitor works fine with my Mac. I have told the computer to extend and duplicate the display using the Windows-P command. I have tried to update the driver for the monitor (I have NEC's driver), but it will not install because the monitor is not detected. Any help you can offer will be greatly appreciated.