Hi.
There are four screws to remove.
1. Next to where the power cord enters the machine.
2. the front right foot of the printer. You will see a little cut-out in the circuit board to allow the screw to come up past it.
3. Back left corner. Inside at the back of the paper roll area. It may have a little leg of a spring under it.
4. Grounding wire. This is at the front of the printer. A small wire will be screwed to the drawer .
Hope this helps.
Mark, May 2008