I have two electrical installations in the apartment - one for sockets, the other for lighting. Today I noticed that the bulb in the kitchen chandelier begins to flash. I thought the light bulb burned out and when I tried to unscrew it, something flashed, shot in the chandelier and blown fuses in the apartment. After turning on the fuses, I only have the light in the hall in the chandelier next to the box. In all other rooms, the lighting stopped working. I guess you have to call an electrician, but I have a few questions.
1. What could happen if the entire lighting system was damaged or simply broken in one place and the electrician should easily locate and fix it?
2. Can I use the working chandelier freely in the hallway, and can the switches in rooms where there is no light stay in the on position, or is there a risk of short circuit? (in each case there is a different set of on and off positions, and unfortunately I do not remember in which room the light was on at the time of the short circuit and in which not, therefore any switch may remain in the on position).