Can anyone help: My lounge lights have just blown when I switched them on. They have done this on several occasions before and it is normally just the bulbs - which when replaced everything is fine. However, I've replaced the bulbs with ones I know work and still nothing. All other electrics in the house are working ok. My fusebox is not a modern 'trip switch type' so I am not sure what to do - the fuse box has four large fuses in it and I don't know which is for where. Anyone got any suggestions as to what the problem might be before I go the expense of calling an electrician? Any help would be appreciated.