Before you bin your washer that will not start have a look at the clip below . I removed the white plastic On/Off plunger type thing and cleaned it and put a tiny film of waterproof grease on the plunger rod and rubber seal ( which is part of the recommended maintainance ) and the nilfisk C120.3 it still going strong after 7 years
Ps dont bother pulling out the bottom part with a piece of wire as per the video just have a look to see that little hole is clear
https://www.youtube.com/watch?v=n93u2YIv-6E&t=78s