HP SCANJET 4570 C - Manual (Page 8)

12 Holding the top and bottom covers
together, turn the scanner upside down on a
clean surface.
insert the screws
13 Re-insert and tighten the four screws
with a Phillips screwdriver.
Step #7 Insert the screws
location of screws
14 Turn the unit over so that the glass side
is facing up.
insert the scanner lid
you can now re-insert the scanner lid, with
the lid in the open position.
15 Align the lid hinges with the slots of
the top cover and slide them in.
scanner lid being re-inserted in scanner