If you've checked the socket and the Fuse then unless the cable is damaged then you DO have power to your boiler - it's just that the boiler is not making best use of it.
Take care if you poke around inside the controls because there's likely top be power in there somewhere.
Probably best to call in a boiler expert after checking any timer control that you may have is calling for the boiler to work.
Good luck...
Peccavi, November 2012