The Lenovo Y50 (Win 8.1 Pro) only has an HDMI port and I will be giving a presentation where only a VGA port is available. I can get an HDMI to VGA adaptor that does not need to be powered (via micro-USB) if the HDMI port provides at least 200mA.
Does the HDMI port provide power? If so how much does it provide? Is there a way I can see this in the ports settings under Device Manager in Control Panel?