Did you buy from a retailer if so and its faulty you can return in for a refund up to 28days I believe or replacement. Don't accept repair. Worth reading on the internet the rules of 'Sale of goods act'.
If you have had it for sometime before the need to use it then check the warranty
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix d.i.y tools.