Aquarius WF340 not turning on?

I have an Aquarius WF340, just recently when I try to turn the machine on, nothing happens (I have checked all wiring and fuse), then if I press an option button the machine will turn on - I then have a problem de-selecting the option button to enable me to start the cycle I want to use. It seems that the options buttons are sticking and sometimes coming on in the middle of a wash cycle. The last wash I did before this trouble had the enchanced option button selected (by error) which I have never used before.