Follow these steps to insert memory modules:
Turn off the computer. Then turn the computer over to access its base.
Remove three screws from the memory door; then lift up and remove the memory door.
Removing the Memory Door
Remove the memory modules from its shipping container.
Align the connector edge of the memory module with the key in the connector. Insert the edge
of the memory module board into the connector. Use a rocking motion to fully insert the
module. Push downward on each side of the memory module until it snaps in place.
To remove the memory module, release the slot locks found on both ends of the memory slot
to release the DIMM. Then pull out the memory module.