Power loss to bliler?

I have had a problem with my Worcester 24i boiler for a few weeks where sometimes the heating comes on and sometimes it doesnt although when it didnt come on, you could hear it firing up like it had come on. There was also a problem with the hot water. Sometimes it would be hot and sometimes it wouldnt.

To get either the hot water or heating to come on I would have to switch the mains swith on and off and torn the dial a few times.

Now I cant get either to work. The fuse light is on but the power light on the boiler is off. Its as if the boiler is completely dead.

Is there anything that I can do or does it look like something has blown?