I got an email response from ACER today. They advised a combination of things that obviously resets something (unplug it, hold power button for 10 secs, wait 15 mins, plug it back in). Anyway it got the thing going, not too sure what it resets but it worked and now Qui Gon Jinn is off and running again.
The Seti guys have released the CUDA application. So now its official. I will have to sort out the appropiate power adapter cable for the video card pretty soon. I will be installing the CUDA aware version of BOINC on Qui Gon in anticipation of getting the video card working.