I've had my Yoga working almost flawlessly since purchase. I use a Wacom Cintiq without issue and our of no where, I get a black screen on display 2. I've tried multple displays and cables. I am aware converters do not work on this model so these are straight connections. I uninstalled drivers but that didn't help. Plugging in HDMI from a basic display turns the primary screen black. Before messing with the drivers, I could at least have the primary screen up so basically, I made it worse. This model has both integrated Intel 520 and Nvidia 940 graphics. From what I recall, plugging into the mini dp or HDMI are hard wired to the Nvida chipset. I downloaded a nvidia cleanup utility and started over. At least now I have the mini dp port back. Any ideas? EDIT: I've been able to duplicate the displays and confirm Windows does see both displays. No matter what cable, resolution though I cannot get video to actually display. So weird, I get the no signal on whatever is connected to HDMI but Windows lets me change the resolution, extend, etc.