Lenovo IdeaPad U550 - Manual (Page 77)

Chapter 6. Upgrading and replacing devices
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6
If two SO-DIMMs are already installed in the memory slot, remove one
of them to make room for the new one by pressing out on the latches
on both edges of the socket at the same time. Be sure to save the old
SO-DIMM for future use.
7
Insert the notched end of the DIMM into the socket.
Press the DIMM firmly, and pivot it until it snaps into place. Make sure
that it is firmly fixed in the slot and does not move easily.
8
Reinstall the cover of the hard disk drive/memory compartment by
aligning the side of the cover first, and closing the cover. Then tighten
the screws to secure the cover.
a a
b
a a
b