in the asus mb bios under the priamny video output..is the next settings set to enabled or disabled. one of them is for muilt monitor support and video rendering. also did you install the newest intel chipset driver and control panel. most control panel for video cards you have to turn on the second monitor. the last point of failure would be the adaptor for the hdmi to vga is may be bad where it blocking the video info..try another adaptor to see if it works.