If, when executing the home sequence, one of the axis does not stop when reaching the endstop, press the reset button immediately to stop the motor.
The most probable cause is a bad endstop or a bad connection. Please check the endstop from the axis with the issue of your TEVO Tornado. Make sure that the carriage can reach the endstop and trigger it.
Check the cable and make sure it’s connected to the correct axis board slot. Check the endstop wires and make sure they are correctly soldered.