I am the person that will be helping you today.
Being that you already had the motor, mainboard, and sensor replaced, this means that the CR ENC ASSY is either not connected correctly and/or requires replacement.
I will be standing by, looking forward to your response.
Is there anything else that you need help with? If we are done, please do not forget to rate me 3 stars or more. If there is more to be done, please let me know.
Thank you. Please, do not forget to come back here in one month.