Hello, I recently purchased an adapter which has the ability to convert the output from the macbook pro to vga+hdmi+dvi. http://www.ebay.com/itm/261577127390?_trksid=p2060778.m1438.l2648&ssPageName=STRK:MEBIDX:IT However, when I plug it in, nothing happens. The screen flashes but that's it. I go to the settings page, I see that an external screen has been detected, even gives me the ability to adjust the resolution but nothing appears on the connected screen. Any idea on what's happening? is the adapter faulty? PS: I tried connecting to the HDMI with a thunderbolt to HDMI cable, that woks!