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