Check the power source if the opener doesn't run using the button on the remote control. Make sure that power is connected to the Genie opener's motor. Visually inspect it.
Try replacing batteries in the remote control if the opener doesn't run.
Look for stuck buttons on the remote control or wall console if the door opener starts for no apparent reason.
Check that there aren't any obstructions causing the Safe-T-Beam to trigger if the door starts down and then stops and goes back up. Take a close look at the lenses and try to see if they look out of alignment; they may have been knocked astray. Visually inspect the garage door for binding.
Lubricate the door and opener if the door starts up, but stops before it's completely open.
Adjust the limit switches. To adjust the close limit switch, disconnect the magnetic carriage assembly and, with the garage door fully closed, slide the Close Limit Switch until it's aligned with the carriage assembly magnet. To adjust the open limit, open the door to the full open position and slide the Close Limit Switch until it's aligned with the carriage assembly magnet. Tighten the set screw.
Adjust the Genie Excelerator force controls. They are on the motor. Adjust the open force and the close force so that the motor stops when the door touches the floor and when the door is fully open.