How to disassemble to get small piece of paper out of back.

Before you disassemble, try this: make sure the printer is all assembled - no screws out - plug in the power, make sure there is paper in the tray, wait for the display to come up (if it is a jam, an error message will display), then press and hold the "AC" button until a sheet starts to feed, then let up on the button. The sheet with the small piece of paper that's causing the jam error (if that's what you're getting) will spit out.

Problem solved - hopefully for you.