7/15/15: If you experience a Cybex 425T or 445T treadmill where the LED speed window is not responding properly, verify that the safety key is fully secure. Generally the speed window will have small circles that rotate around in the speed window when the safety key is not plugged in place. This could also be a symptom if the safety key or microswitch that it plugs into is defective.
Cybex 425T, 445T Treadmill Speed LED Display is off
