HP Color LaserJet 5550 Printer series - Manual (Page 257)

8. Holding the DIMM by the edges, align the notch on the DIMM with the bar in the DIMM
slot at an angle and firmly press the DIMM into the slot until it is fully seated. When
installed correctly, the metal contacts are not visible.
9. Push down on the DIMM until both latches engage the DIMM.
Note If you have difficulty inserting the DIMM, make sure the notch on the bottom of the DIMM is
aligned with the bar in the slot. If the DIMM still does not go in, make sure you are using the
correct type of DIMM.
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