Zanussi Aquacycle won't start but locked with door light on ?

Hi
Can you help please? Aquacycle 1400 (FLE 1416W) is jammed shut, door locked (light on) with clothes inside, no water yet. The green start/pause light is flashing but will not switch programme on to run as it should when pressed. Programme lights are all lit as usual.

I seem to remember a repair man once showing me how to press two or more buttons simultaneously to clear an electronic jam but I've tried various combinations to no avail. Many thanks in hope!

Judy