Sketch won't run

UKHeliBob:
Which sketch is that ?

What error did you get ?

It was the Parolla Scrolling sketch, and there was nothing on the display, as it went off.
As soon as I plug in the usb lead to the arduino, the display lights up then goes off! Is it faulty or what as I have only had it for about a week and have not been able to get the sketch to run, even tho' it lights up.