Look for small led lights on the sensors.
Troubleshooting my chamberlain garage door opener sensor no light.
A common cause of a malfunctioning garage door sensor is lack of power supply.
If you do not hear a click replace the logic board.
Hopefully one of these options worked for you.
The clicking noise you are looking for is the sound that comes from the relay on the circuit board.
If you do not hear a click coming from the motor housing then the relay on the circuit board is bad.
If they re turned on in both the sensors then there is no issue with the power supply.
Chamberlain garage door simple sensor diagnose and fix.
Manually lift the garage door and release it when it is opened halfway when the door is appropriately balanced it will neither move up or down but stay in place supported by the springs.
The circuit board on your garage door opener will have to be replaced if you want your light to function properly.
Sensor power reconnect the sensor to its power supply.
This does not apply to garage door openers that use a work light that is separate from the garage door opener.
Chamberlain garage door openers troubleshooting support find the chamberlain garage door opener technical support you need to get your garage door opener operational.