Hello guys,my first post on this forum.My Biasi boiler stopped working last night,looked at it this morning and the 1.6A fuse on the left hand circuit board had blown.I replaced this and it blew again straight away.After looking at the boards carefully,I noticed a bit of scorching around one of the resistors on the right hand board so I removed it.When looking at the underside,it is badly burnt(a big hole in the board) so is well and truely knackered.Any idea what would cause this and how do I find the part number so I can order a new one.The boiler was fitted about 7 years ago and has been ok up to now (Biasi Riva Plus-M90D so I beleive)Any help would be gratefully recieved.