I need to open up the Aurora AS650C shredder in order to fix the switch that activates the shredder when a paper is introduced and the switch is set at automatic. The white switch that is pushed aside by the paper has become limp and does not spring back on its own when there is no paper. A diagram of the procedure to open the shredder will be helpful. The motor is still good I assume. Please send email to preporter@yahoo.ca.Thanks.