If the garage door motor seems to be completely dead (not making any sound at all, light bulb in the unit not coming on) the motor may not be receiving an electric current.  Check to see if you have lights in the safety sensors or the button on the inside wall – if you do not, then check the outlet into where the motor is plugged to make sure there is electricity to it.  Please note, outlets themselves can go bad or be controlled by another switch or GFI, so just checking the breaker box will not tell you for sure if the outlet has electricity.  Plug a small device into the outlet – if the device works, call us!  If it doesn’t work check for a GFI re-set button or a wall switch that controls that outlet, or call a licensed electrician