Quick Fix Doorbell Repair
Have you ever been standing at someone's door ringing the doorbell and nobody answers? That is the complaint this homeowner received from her neighbor, and that's why we were called. The homeowner needed a doorbell repair.
As soon as I walked up to the front door, I made a bet with myself that it was the doorbell button itself. The reason I say this is because it was really loose against the wall. If it is loose, then there's a pretty good chance there is movement which will lead to damage to either the button or the wires behind it.
Most doorbell buttons are fastened to the wall with either a push fitting, adhesive, or caulking. These don't seem like a permanent mounting solution, but that's the way it goes. If you pull the doorbell button away from the wall, turn in over and check the back. You should have 2 low-voltage wires that connect to 2 terminals. In many cases, one of the wires will be disconnected or broken away from the button. If that is the case just reattach the wire, or strip some insulation off of it and re-secure it. That may fix it.
If you still get no chime ("ding-dong"), remove the wires and touch them together. This will bypass the button and should produce a chime. If you get a chime, the button is bad, so spend $2.00 and replace it. If the doorbell still doesn't work, read this article about doorbell repair.