I am working on the upstairs lighting in my newly bought but very old house. The ground lights all work and I somehow managed to get all the upstairs lights working. But once I had put the lid on the ceiling rose (which was a very tight fit) for one of the light a bang was heard and all the lights went off. I checked the fuse, but thatâ€™s fine.
The thing is as I mentioned earlier the house is very old and it has an old power box switch which controls only the lighting instead of a conventional consumer unit. A wire comes out the power box and then splits into 2 separate cables, one for the ground floor and the other for upstairs.
I have tried everything but the lights are not working. The fuse had not been blown and the connections are all correct. What can be the problem?