[Anonymous]

Are the VGA
connections to the projector and Computer monitor both going through the same hardware?
  If so, try removing that hardware and
connecting each device directly in to the computer with a VGA cable; does each
device start up and display an image as normal while connected directly to the computer?   Using the same Hardware, do two monitors
used act in the same manner (where one will not display anything until the
other is powered on and displaying)?

 

(Support Case
00487225)