A broken door knob can be troubling in a small home; however, in larger houses it can be a real headache, as a simple knock on the door cannot be heard in every room of the house. If your doorbell stops working, it is possible that the problem is simply a case of the wiring running to and from the doorbell having become damaged, either with minor fraying or outright tears in the wiring. By reconnecting your wires, you can get your doorbell up and running again in a hurry.
Examine the wires behind the bell for signs of split or frayed wires.