How do I fix my Zanussi fj1454W. ?

Symptoms; all lights come on for programming and the machine is programmable. When I press the pause release button to start the programme, the light on the handle doesnt come on to confirm the door is locked and there is a clicking sound every 5-10 seconds coming from the locking mechanism. This all started after the fuse blew in the plug. Will changing the locking mechanism sort it.?
cheers

robin
April 2010