I have a K2 machine that fails level detector. My first thought was to calibrate level detector al went well as far as the LED's working as expected, but still failed during test. I took the module from another working machine and switched it to the bad machine still would not pass level detector. So I started switching boards from working machine. One at a time I switched the sensor, Actuator and function board, ran the test each time . Continues to fail. I then switched cables out one at a time. Still fails level detector. I am just a bit confused as to what to do next. Any suggestions will be appreciated.