just bough a yoga 2 and cannot hook up a second monitor. I am using a mini hdmi to hdmi and have tried the Acer monitor, a HP monitor, and a Samsung tv. They all show up under my devices and I know the cable works because I have used it on other devices. I also trimmed the mini hdmi side to it bottoms out when plugging into my yoga. I looked on acer website and they claim that there is no need for a driver and they are compatible with windows 8.1. Any suggestions?