Unplug the appliance.
Take the bulged panel on the rear off.
Is there water/moisture there?
OK, thanks for that.
If there is water there it's likely the heating elements are damp.
Before stripping the machine to clean it, dry the heater assembly thoroughly using a hairdryer.
Take the heater off and dry the back of it too.
Once dry, reassemble and try the machine again.
Let me know what happens.
Don't run it too long or the water will get there again and trip the mains.
If the element has dropped to pieces you'll need to replace it.
Go to www.4hotpoint.co.uk
You should be able to obtain a heater there.
Double check with the supplier that it's the correct one as Hotpoint tend to change things as they please.
When you fit the new element, clean out the condenser and the chamber it fits into.
Good luck with the appliance.
Hope this has helped