when I attempt to print my HP Photosmart 7660 printer keeps asking for paper that is already there. The model # is SDGOA-0376. I can't figure out how to take the thing apart to see if something is preventing it from being able to grab paper.

J. Bouling, May 2011

HP repair manuals are available for quite a lot of their printers.
See if you can get one for yours. You might have to go further afield with a Google search.

Munro, May 2011