Hi Maryanne,
I have the same model and have just done this. There are screws at the back top panel but you also have to remove your lid to get to the screws that secure the front panel. Insert a screwdriver where the lid is connected, gently insert pressure on the screwdriver to push lid to the other side. That side should pop out where it is connected. Be careful when doing this as you may break the lid. Once you have this side out, the other side should pop out. Remove the lid and you will see the screws you will need to remove.
Marama
February 2010