I should tell you that opening the back of an appliance may void any warranty it has left. Also due to the nature, I would recommend getting a qualified electrician to do this for you due to safety hazards. Many stores that cater for TV repair would fix a simple problem such as this for a few dollars.
I will research the model and see if I can come up with any diagrams or tips for you.
In the mean time I shall see if theres an electrical expert about who can help you with this specific problem,
Kelly