I have a 2013 V3-571-6769 Acer laptop. It has 1 HDMI port and 1 VGA port. I've been using the built-in laptop screen for a few months now along with a VGA Dell monitor. I recently purchased a 2nd monitor, which is using a DVI inside the monitor and an HDMI in the laptop (A DVI to HDMI converting cord). I have both plugged in, but my system will only let me use 1 other external output. No matter how much I mess around with it in the settings, 1 of the monitors will be automatically not used and shut off. Is this because I'm trying to extend a desktop over an analog (VGA) and an HD (DVI and built in) ?