HP Color LaserJet 2550 Printer series - Manual (Page 160)

6. Remove the DIMM from the antistatic package.
7. Holding the DIMM by the edges as shown in the illustration, align the notches on the
DIMM with the DIMM slot.
8. Firmly press the DIMM straight into the slot. Firmly close the locks on each side of the
DIMM until they snap into place.
9. Close the two DIMM doors.
10. Reconnect the power cable and turn the printer on.
11. Go to Checking DIMM installation .
150 Appendix E Working with memory ENWW