Here are troubleshooting steps if you find the door control for a Security+ garage door opener is not working.
Remove the red and white wires for the door control from the side or back panel of the opener. These wires are located on the same side as the hanging antenna. NOTE: You do not need to disconnect the wires for the safety reversing sensors.
Use a jumper wire to jump (make a connection) between the red and white terminals on the garage door opener.
If your opener does not activate using the jumper wire, replace your receiver logic board.
If your opener activates using the jumper wire, reconnect the wires for the door control and proceed to step 3.
Remove the door control from the wall. Most door control have a push button that can be removed to reveal the first screw. After removing this screw slide the door control panel up the wall to remove it from resting on the second screw. If these directions are not helpful for the door control you have, refer to the owner's manual for directions.
Verify there is not excess wire connected to the screw terminals on the back of the door control. Excess wires touching the circuit board can cause a short on the circuit board.
Check that the screw terminals on the back of the wall-mounted door control are tightened enough to hold the wires in place, but not over tightened.
Finally, remove the wires from the back of the door control and touch the wires together. NOTE: These are low voltage wires, touching the exposed ends is safe.
If your opener activates after touching the bare ends of the wires together, replace the door control.
If your opener does NOT activate after touching the bare ends of the wires together, replace the wires for the door control.

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