Hp psc 2110 scanner saying busy solution

- Take the scanner apart like described on that page
- Clean everything
- Check where the white stripe is on the bottom of the glass plate
- Put a mark on the plastic, where this stripe, so you know the location of the stripe on the outside as well.
- Enlarge this mark, so it is on the main body as well
- Remove the glass again
- Align the scan head by hand, so that the bottom mirror is exactly on line with your mark
- Put everything back together
- Be careful, don't move the scan unit!!
- Turn it on when it's complete