Thank you Rusty,
I have now managed to burn disc by connecting separate leads for DVD burner and camcorder to AC mains although previously I am sure that it also worked when power was supplied only by DVD burner which in turn was connected to camcorder via usb cable?
Just wondered whether you could provide an answer for this please.
I have a PNY professional 16Gb memory card which has video footage stored. I have viewed this footage previously through my camcorder without any problem but recently inserting the memory card, the message on the camcorder reads "cannot play". Any ideas please of viewing and burning this footage? I have checked that the card is not in the lock position.