One of the most common problems when it comes to garage doors and one that is not that hard to fix by yourself. You can usually identify the problem when your garage door opener makes a grinding noise but doesn’t move. Chances are, your main drive gear has hit the bullet. The bullet is the plastic gear that comes in direct contact with the worn drive gear on the motor. In case you’ll decide to handle if by yourself, here some quick tips: first, unplug the motor. Remove retaining screws from the cover and shine the flashlight directly at the gear set. If the gears have screwed up teeth, it’s likely that you can just replace them and that will solve the problem. If not, your opener might simply be shot and you’ll need a new one. Make sure to write down the make, model and serial number of your opener. You can find all of the information on the back of the opener.