OK, so I fixed my on problem but thought I would let anyone else reading this that has the same issue know how I resolved it.
I was told Windows 7 includes a hot-key for rapid switching to an external VGA projector. Holding the "Windows" key and pressing "P" opens a pop-up window with the options "Duplicate" or "Projector Only." Selecting "Duplicate" will mirror your laptop's display onto the projector. Selecting "Projector Only" disables the laptop's LCD screen and only displays on the VGA projector.
Although I couldn't see what I was doing, after the laptop had started up I pressed "Windows" and "P" and the "Enter/Return" and hey prestos, the display was back