PROBLEM WITH COMBI BOILER.POTTERTON 100 PUMA?

hi without looking at it bud its hard to say but if all power has gone see if u have power to the pcb (printed circuit board) if u have then check the slow blow fuses on the pcb if u ent then check the fuse in the fuse spur which should be by the boiler . but it could be your pcb thats gone which im afraid is the most expensive part on the boiler good luck with it bud