Bedroom light bulb blew, then the bathroom lights flickered and went out, along with the extractor fan. Put a new bedroom light bulb in and that worked, but the bathroom lights don't work now. Checked the bathroom bulbs in a socket elsewhere and they are fine, but no power it seems in the bathroom. The extractor fan doesn't come on either when the pull cord is pulled. Any ideas? I've checked the fuse box and all is okay.