We have a magnetic lock on the front door of our apartment building. From time to time it stops working - it just doesn't lock the door. It seems as it doesn't have power or is somehow turned off because the little light on the button for unlocking it from the inside is not lit. The box with the power suppply inside is locked and I think nobody from the building has a key for it (only the company which installed the door has a key). However, yesterday I found the door propped up with a small rock in order not to close. This was done by a dentist in the building so she doesn't have to click the button from her consulting room everytime a patient comes in.
Is there a possibiliy that she did something and turned the system off? Could it have broken because it had stayed open for hours?