Blinking Lid Lock Light, loud hum, Replaced Shift Actuator

Have been happy with this machine till this. Started with blinking lid lock light and would stop during cycle. Have to unplug the machine to make it turn off or respond. Called a service company who sent an idiot to work on it. He fiddled with the lid lock, said he couldn’t get it to duplicate the issue, charged and left. Called back cause problem came right back, this time the shift actuator, we replaced and still have the same non function. I have replaced the shift actuator without any success in resolving my problem. Can I test the motor and the control board? Please help!

Frustrated before the Holidays!