2 light switches in 2 different rooms suddenly stopped working

Natalya asks:

Good afternoon!
Today, at different times of the day, in two different rooms of the apartment, the light switches stopped working. The light was turned on and just went out unexpectedly. At different times. Both switches are double, turn on the light in different rooms (as a result, there is no light in 4 rooms). The bulbs are definitely in good condition, they have changed the leash for a long time, before there have never been problems. Please tell me what could be the problem?

The answer to the question:

Hello! It’s not entirely clear, first one, and then the other switch stopped working? It may be a coincidence, or maybe they are connected from the same distribution box and the connection is lost there. You need to look for her and check. You also need to check if there is a phase on the switch, if so, you also need to check whether zero comes to the lamp. After determining what is not, look for the box and repair the open.

And in general it is not clear - in 2 different rooms, but in 4 rooms. Is there any light in the apartment somewhere?

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