Bosch wfk 4000 washing machine not start

I have the washing machine bosch wfk 4000 . It was working fine, but one day it do not want to start  although every thing ok the red lamp on the door is closed water supply ok.
why it does not start
Please help me the possiple problems so that i can fix it.
This model is old and no spare parts but it is in good condition and almost new.