Hello Phyllis,
You have got a devil of a job on there, if your machine is a two piece body you have to undo all the screws that you can find on the back and then try and locate the plastic catches that snap the two body parts together, the only way to do it is with a thin knife prising between the join all the way round the body but be very careful they are very easy to break, I don't remember this question ever coming up on this site.
drivewithken
October 2009