How can I fix my Ariston MBA 3831v - about 7 yrs old?

The lights are on but no ones homes !!! Ive defrosted my fridge freezer but cant get it to turn back on. It was working perfectly before I turned it off to defrost. The green light comes on - but the motor wont start up. Ive tried every combination of what it says in the book but it still wont start. Im sure its something simple - Help !!!