No electricity

I was sitting in front of my notebook an evening some days ago, my wife was about to turn on the TV when suddenly the back light flickered and I could see that my notebook was running on battery, what's going on I ask my wife as we still have light in the living room, but she doesn't know. We go to check the fusebox but without getting any result, all the fuses was in perfect condition, apparently the problem was located somewhere else and all we could do was to light some candle and call for an electrician the next day.