30 seconds with Google image search produced a detailed exploded view of your vacuum:
http://www.searspartsdirect.com/model-number/11622812205/0582/0642000.html
It looks so simple to disassemble, I seriously doubt your abaility to fix it, given that you can't work out how to remove a half dozen screws based on an external examination.
As there is potentially lethal electricity inside, can I suggest you give the problem to someopne technically competent.
XXX, August 2016
