Ferroli HE 31 C boiler leaked now no power?

Last night, I heard a strange dripping noise and discovered it was a leakage coming from the boiler. I switched it off at the wall and the leaking stopped. I took off the case to dry around the inside carefully and, on replacing the case and switching it on, it worked fine for about 20 mins then completely died...no noises or nothing on the display. I have tried pressing all the buttons for 5 seconds and everything it says to do but nothing. Any ideas? Thanks.