Whilst painting the ceiling in our bedroom I accidentally caught the light fitting with the ladder, soon after the bulb popped. I tried a new bulb but that wouldn't light up. We have a dimmer switch that has been there since around 1984 without problems, could it be that which has blown. There was always a slight sizzling sound that came from the switch but there is no sound at all. I did unscrew the plastic from the ceiling rose but all the wires were connected. Advice please. Kind regards Denn.