I got you buddy. You have to unlock the box beside the safe. The code for that is on the painting. After unlocking the box, you'll get a dentist tool. With that you can use on the candles beside the dining table.
Ran into a small problem. On the android build 6.0, right after entering the office of the principal for the 5th quest of the main storyline, this problem occurs. I can't ignore it, because of this i'm stuck and can't continue with the game.
