tumble dryer sudden stop!?

Hi, used our tumble dryer and it worked as usual, went to put a second load in and it is completely dead! Suspect an electrical fault, belt is fine and the drum will turn. I've changed the fuse and tried a different socket but no luck, also had a look inside and there are no loose wires or signs of damage. machine about 3 years old. Its a Hotpoint Aquarius TVM560.