BEKO DE 2431 FW - fails to start

Question

My machine is just 5 months old and I am having intermittent problems when starting the machine. Although the power light is on the 'Wash' light fails to come on hence the programme fails to to start. Only by turning the slector k**b to 1 and returning to 3 (my preferred programme) and pressing the Start/Stop button again will the machine operate. I have checked the salt and rinse aid levels and also that the upper basket is properly located in the machine (i.e. back as far as it will go). Since 24/4/08 there have been 7 occasions when this has occurred.